Malicious PDF — malware analysis report

Static analysis result for SHA-256 5629b5da2fe2cab1…

MALICIOUS

PDF

76.0 KB Created: 2021-07-03 19:05:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 7e71376fd6d5e1e69a3f59ab1df5dd44 SHA-1: bc6433d597b4e4e35fec29d4c65bfae348dd19c6 SHA-256: 5629b5da2fe2cab1ee8cb9f75d69c2065b763bc7c6e22bfebda9cada873ef7f6
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains numerous links to external PDFs hosted on compromised WordPress sites and disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URIs and the overall structure indicate a phishing or scam attempt, likely to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/f4c61fd184123520cb6ecfe66f302597/pogisalafe.pdf In PDF document text
    • https://askopenko.com/wp-content/plugins/super-forms/uploads/php/files/a02b86c4c1a7459f3547755a833d7601/ledak.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/1a5749ccea789d656253ce8a792154ac/60418513100.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/abca95335d37e998e6b3802f8d76b5e3/vanuxo.pdfIn PDF document text
    • https://emmaushuis.org/pages/mofitusiliwomavat.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/cc946bcb7c6921d7d6b7767f9fd0d4e0/zopir.pdfIn PDF document text
    • https://seerupit.dk/assens/file/10731365396.pdfIn PDF document text
    • https://rosycaffe.com/file/dibez.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb0e2d77ae---xijulofonusodibonometi.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/moseketolajevogewonaziged.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16086cba032f8f---26576833351.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/e16edf6c15f97d38bb82c61cf1e87555/85133157283.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7873517c91---jevuxirozikoxi.pdfIn PDF document text
    • https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160835f2f8feeb---vufapaj.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c879c87c9be---tomatibijo.pdfIn PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/76bb6330839dc5babfef4b0491cc23a8/kexawugavuzise.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbef76da29---retidudaxovisoro.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607534bd74d1a---26627237001.pdfIn PDF document text
    • http://leoclubmarsala.it/userfiles/files/61198624179.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/qrbegdurht4dg4vhdn1qa6lr7u/nibuzixatogore.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079b783580d8---75650978215.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d7ea7e3d478---pijugubelumapeligolufalal.pdfPDF link annotation
    • http://vtvxm.vn/userfiles/file/88622754242.pdfIn PDF document text
    • http://bright-inter.com/file_media/file_image/file/gogariziwojobitanasadum.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=previous+year+question+paper+of+upsc+prelims+with+answer+in+englishPDF link annotation
    • 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_off0000c308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC308 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000db1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1A 17000 bytes
SHA-256: 72ee8549ee6f7f158648d607e47318fa1ec6467df23aee6ffa8e353437872c0a
font_02_sfnt_off00010787.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10787 11440 bytes
SHA-256: 8dbd1d91873280750b4ebf7c4c2bed8c14ae4c77027cde4fa9fcde6b3ba091ac

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