Malicious PDF — malware analysis report

Static analysis result for SHA-256 92fdb68696193261…

MALICIOUS

PDF

89.9 KB Created: 2021-06-29 07:03:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4eed9e5186f73e9a76e0cc4d3174b8f0 SHA-1: 0ecdd8500ca49e1ca7e258dd5404f8bee29122ae SHA-256: 92fdb686961932612f37c5e3adf3751235dee58cca2168b76417b5a878e54e5a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to host malicious content or redirect to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://nomylo.ru/uplcv?utm_term=where+can+i+stream+the+godfather+epic
    • http://www.alfapilates.pl/upload/file/ximebejoverazelizoxibikit.pdf
    • https://bhsbeacon.com/FCKeditor/file/8882486113.pdf
    • https://kompaspt2.com/contents//files/sozekavelowiwuxaxizubetom.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/1jna9hulp273lq3gbitvk381e1/54466337526.pdf
    • http://grafiport.com/userfiles/file/52699531448.pdf
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/160918beca1cf8---vezutisugupakob.pdf
    • http://iccarrentals.com/files/file/59559366771.pdf
    • http://ptairsupply.com/userfiles/file/40438677669.pdf
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/373d1b40ada8a731e364d7bedf051c04/7033343170.pdf
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/thpp127rgfu8el9ue7qc9h1gr5/75577569041.pdf
    • http://fonnepal.org/userfiles/file/46053654447.pdf
    • http://iccj.jp/images/uploads/fckeditor/file/33140716590.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/f31255d384532111aa2af138159e7314/27565366627.pdf
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/e0r778ed6mb8msa8s3hc6vtk70/96705234501.pdf
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/650aaabbd8a857555756c251314ecafd/xodel.pdf
    • http://kemenyseprosiklos.hu/upload/file/48781137958.pdf
    • http://escuelasfutbol8.com/docs/files/73129487332.pdf
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b79a1acff02---81708193433.pdf
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a9f875c6db---53737698811.pdf
    • http://yacpa.org/yacpafiles/file/87324583434.pdf
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160921e8368117---muwunajop.pdf
    • http://whatifitspossible.com/ckfinder/userfiles/files/zebanuwewuzi.pdf
    • https://oklogistic.lv/upload/file/katawanakimadiman.pdf
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/d2d92e4d5d805b516cd435cc691a5bea/japetawivepojo.pdf
    • https://bednidhitraders.com/userfiles/file/fevololejan.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc81.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC81 16792 bytes
font_01_sfnt_off00011498.bin
8a539e08845d5e9a50c3e82efbed00f185e50cf33035168bb76967b842fb27a0
pdf-font-stream PDF embedded font (sfnt) at offset 0x11498 11016 bytes
font_02_sfnt_off00012ddb.bin
88fad531f7df8711e7eddc098220b5310279f513e1324928afcc1c0d6cb53b5c
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DDB 17032 bytes