Malicious PDF — malware analysis report

Static analysis result for SHA-256 49b9f2d4421c8d7a…

MALICIOUS

PDF

78.9 KB Created: 2021-03-29 06:40:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d152fd0e5c51a0b2018c1274092dafc8 SHA-1: b141d71df37f9ddf3eb22265e6b50253aa9027cd SHA-256: 49b9f2d4421c8d7a7dd8447afa0c5646c2ebb4faf834fcf33091b3328eb7f388
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 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://druttle.ru/wix?keyword=wapo+death+notices PDF link annotation
    • https://lubozukutiximik.weebly.com/uploads/1/3/4/4/134472848/wofulunolar_manija_puvozo.pdfIn PDF document text
    • https://rusaxexuratibu.weebly.com/uploads/1/3/2/6/132680860/5441274.pdfIn PDF document text
    • https://cdn.sqhk.co/pibexezases/c8Qjdjg/fibifelol.pdfIn PDF document text
    • https://cdn.sqhk.co/duvapegoleva/gdjjfNH/rolonadupugupa.pdfIn PDF document text
    • http://hd-cam-mirror-up1.club/kebanipabokitu1sx3y.pdfIn PDF document text
    • https://zerimesatevig.weebly.com/uploads/1/3/4/8/134879836/davamexaxerubuma.pdfIn PDF document text
    • https://bokowamimufap.weebly.com/uploads/1/3/2/7/132712050/19374c.pdfIn PDF document text
    • http://menbp.online/toganaxea5oyl.pdfIn PDF document text
    • https://cdn.sqhk.co/dimusokobab/ohghbji/nezebosekekotuwoz.pdfIn PDF document text
    • https://sabidodavo.weebly.com/uploads/1/3/1/4/131408103/gupom.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://920f4c01-5fd6-4c40-8b27-b99972fecb60.filesusr.com/ugd/d63aaf_91f71ad6d871407bac17db44901b1f3a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dibedamoka/sunflower_oil_infant_formula.pdfIn PDF document text
    • https://s3.amazonaws.com/pogolo/guided_meditation_for_anxiety_depression.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/matthew_hussey_camila_cabello_today_show.pdfIn PDF document text
    • https://aa6eca1a-c690-4a36-985e-a873157a80b3.filesusr.com/ugd/081493_e8b8f6e5c8a347ed913d3a39890a875b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/salosibejodod/59297498978.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/steam_slow_fast_internet.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_off0000e85d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE85D 5048 bytes
SHA-256: 8b06afa0393b0bb13b7cfa1a3e543de6e5f5f1881d2368853db521737f8ff78a
font_01_sfnt_off0000f98d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98D 3476 bytes
SHA-256: 1aabd41246c92e7a85492534909a4ed837e1319789f9de8e85c6c6d41d38793d
font_02_sfnt_off0001072e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1072E 11612 bytes
SHA-256: 1f0863aa83b5d34014836cb829081ac0b2e3350a67b19bfeb5cbd1fb9d13bed2

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