Malicious PDF — malware analysis report

Static analysis result for SHA-256 357d343cddbc7047…

MALICIOUS

PDF

131.0 KB Created: 2020-12-02 15:32:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 37b3fddbbd8e2d1526c43a9ed61dd67b SHA-1: df62fc53e79cf10bbb79d446756823f0bce22f13 SHA-256: 357d343cddbc7047c218c8ded08e84929645a483306707d4d430bde00ed4e49d
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a callback-phone (TOAD) lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://trafficel.ru/123?utm_term=sharp+aquos+tv+manual+buttons PDF link annotation
    • https://pezopipowom.weebly.com/uploads/1/3/1/4/131406060/5c4dfafadeb37ec.pdfIn PDF document text
    • https://vemewibikem.weebly.com/uploads/1/3/0/7/130776349/9955426.pdfIn PDF document text
    • https://zoxetojasag.weebly.com/uploads/1/3/1/4/131437223/5753031.pdfIn PDF document text
    • https://wufenimikefi.weebly.com/uploads/1/3/4/3/134366244/depunepuk.pdfIn PDF document text
    • https://dragoncity.beIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0e464ab79f442f229936f/t/5fc370ca145a8629dc1ca437/1606643914599/sweet_onion_chicken_teriyaki_subway_ingredients.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/15211183327.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/d_d_5e_solo_adventures_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d650403f5353fd956949/t/5fc147b93485235c86f60394/1606502329747/chronologie_empire_romain.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/porenonotajugotuwuramofe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1583bff13940aa242bd98/t/5fc45b709ee0f32b87df09bf/1606703984950/protein_shakes_walmart.pdfIn PDF document text
    • https://s3.amazonaws.com/tugabijenovili/cara_belajar_photoshop_cs3.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc52592e2fce462bca77432/t/5fc67eb93c02f22b9dede282/1606844090601/multicraft_block_craft_mini_world_3d_descargar.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/63548695027.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe1f194f98375720a912c6/1606295322105/camille_vs_riven.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B728 5488 bytes
SHA-256: 7d02e16de1ce5102e2efa6641ae19be81ec84741ad8453b24c04fdc9d6d4c31b
font_01_sfnt_off0001c9a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C9A5 2092 bytes
SHA-256: 78e94e2e47178245ca437e301e19f50dc99845ecc02da2ba30fe2b1e34051cc2
font_02_sfnt_off0001d34a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D34A 12612 bytes
SHA-256: de73354495e065294b7bf0a6c58eef7987e468f08ad22e34b0aca7a6bbdb26e1

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