Malicious PDF — malware analysis report

Static analysis result for SHA-256 60d8b88a73fb7da8…

MALICIOUS

PDF

91.0 KB Created: 2021-07-01 10:24:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: eb31dc5a0a78c4120908a9a39158977d SHA-1: 25f1add3d296f8182763f7131d51e9604e36f154 SHA-256: 60d8b88a73fb7da8ebb786574c204dad9a6ed3656502e2974345091465f5a887
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The primary heuristic indicates a link to an algorithmically-generated URL, suggesting an attempt to evade detection. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution through these link farms. No scripts were extracted, but the structure of the PDF and the nature of the URLs point towards a common phishing or downloader pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://wastran.ru/uplcv?utm_term=mars+in+7th+house+marriage+partners PDF link annotation
    • http://thetachikappasigmaalumni.org/clients/5/56/56ac51e2ee760b54d3ff8b7d53c877b7/File/74215800428.pdfIn PDF document text
    • http://bayzones.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/pebufifisudowifo.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/e9e6b2c0719e9b307f100395b295d2a5/12242152467.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/rpj1n0fl3i28r1gtl0a2tl6ct3/91865818390.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607542e522c06---58113006281.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/9942bbaaafd1653651d43019d9f323dc/junuzosematof.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/51425835404.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/sosavepadakexoxefuwofovav.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/0e59eda060b66bbcd26aae1cad827b57/wuzezawakenibijomixodu.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084aaebc5de8---59382980434.pdfIn PDF document text
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/23125542214.pdfIn PDF document text
    • http://maynenkhipuma.vn/quangbasanpham/app/webroot/upload/image/files/lukideb.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/gezovusevuw.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/b465f3cced933d0c1ec2213ffdafeadb/32571299402.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b252e57b64f---97959380487.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/0jii28he08aoh775cnf4fc46e4/lepovuzotukepamul.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/hb8i8l5pat8nkc9jv7lbu3hv9b/sogusijepodorasowatugupi.pdfIn PDF document text
    • https://www.hdcorp.com.br/wp-content/plugins/super-forms/uploads/php/files/it15j8ue6bem5prnof8k8jmh41/lagafosexukegomab.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/190dd3a88e98b925937eab68255f2b2b/3472575414.pdfIn PDF document text
    • http://yoron.net/up/files/gusarasikamadazopizaf.pdfIn PDF document text
    • http://xn--szabowski-tub.pl/userfiles/file/25673887577.pdfIn PDF document text
    • http://vejwun.cz/images/visanabez.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/ttk5te9kmhshfq65bsr7bm97pb/jiwaxo.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160a03ab06639e---ziwas.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/982f77c8ec3b3c071c17d6a9be62ee12/zimomifuxanidima.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000100e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000118f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118F9 17224 bytes
SHA-256: 295d4d883af8d8f4ca263a7b8df150b72d92ade04b4cce00816b13111cba1010
font_02_sfnt_off000145b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145B2 10796 bytes
SHA-256: 4dc94379d18d6bbd32b8730d841541a1e1ba40cd3a1b21a68193187da623cae6