Malicious PDF — malware analysis report

Static analysis result for SHA-256 7679b1efbb79c1e0…

MALICIOUS

PDF

81.5 KB Created: 2021-04-10 14:58:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: e952d5149e1089793a48197e8e0a9fa4 SHA-1: cd6f5d362045d6b0cfd9a40f50f003a4653e50c1 SHA-256: 7679b1efbb79c1e090005b2f7ddac84a87a905aa90c4ffc565c4dd92264b894c
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains a link farm with numerous external URLs, many hosted on disposable domains, designed to redirect users. The document body, though heavily obfuscated, suggests a lure related to "sheet music", likely to trick users into visiting the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://dugedepap.ru/strik?utm_term=last+of+the+mohicans+sheet+music+violin+free PDF link annotation
    • http://zugasanuko.getenjoyment.net/guzanawetobivizip.pdfIn PDF document text
    • https://nixotebiwozo.weebly.com/uploads/1/3/4/6/134667174/xubefum.pdfIn PDF document text
    • https://cdn.sqhk.co/nisikevepoxi/ecfAibk/wwe_raw_results_today_wrestleview.pdfIn PDF document text
    • http://best-ital.fun/duterefenokawoxekofh2ht.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/cighxij/fajimi.pdfIn PDF document text
    • https://cdn.sqhk.co/tezizejaropu/dm9oSr3/globe_load_card_error.pdfIn PDF document text
    • https://polidixixav.weebly.com/uploads/1/3/4/4/134467230/bokuwopu.pdfIn PDF document text
    • https://putonikasobex.weebly.com/uploads/1/3/1/0/131070178/4408330.pdfIn PDF document text
    • https://cdn.sqhk.co/safubuguva/gdujdif/siam_express_delivery_thailand.pdfIn PDF document text
    • http://fesotisifofil.mygamesonline.org/dixigetamexar.pdfIn PDF document text
    • http://bachanalytics.com/harry_potter_half_blood_prince_game_macz9120.pdfIn PDF document text
    • http://findattime.com/nozotutazevexibiwivitlja6.pdfIn PDF document text
    • https://kekufekogaj.weebly.com/uploads/1/3/4/7/134768560/futifegu-wagixaxugof-xakevojagemudop.pdfIn PDF document text
    • http://wemuwugisenoro.iblogger.org/rapopemewatemovuxapapira.pdfIn PDF document text
    • https://cdn.sqhk.co/gagobuniponi/biaiehd/63610587930.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/fitokuv.pdfIn PDF document text
    • http://pisonepegosa.myartsonline.com/operations_management_trainee_salary_philippines.pdfIn PDF document text
    • http://devepovamijube.epizy.com/48_rules_of_power_list.pdfIn PDF document text
    • http://ruzuzis.rf.gd/mudebiribelagagabozoj.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/93723208637.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ff70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF70 5120 bytes
SHA-256: 4bece36d33035181e09b6d3c4cbcf899ab50c4460da73ea39ff29480177fa87f
font_01_sfnt_off000110bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110BF 11824 bytes
SHA-256: 612666d24715753005ffe0584f3135de341dfcb0e3da2c5af1840709a584a969

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