Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ece068cc2b1ce92…

MALICIOUS

PDF

81.9 KB Created: 2021-06-02 04:14:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 7676af8ba66bdb24e7f286bb90cb6005 SHA-1: 00a82f85e564949e94fabb965f5eb1f349d95e07 SHA-256: 2ece068cc2b1ce92e3f50285ad4fa70324759f474fe098d183498e308a1a71cb
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and extensive link farm are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • 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/pbw?utm_term=fundamentals+of+engineering+thermodynamics+8th+edition+tables PDF link annotation
    • https://digulowewuw.weebly.com/uploads/1/3/4/3/134363346/viruvim.pdfIn PDF document text
    • https://vakurizilobiwil.weebly.com/uploads/1/3/0/9/130969742/guporokenijerubu.pdfIn PDF document text
    • https://moxitimufetumo.weebly.com/uploads/1/3/4/0/134040580/jezajeboxuvov-woritujon-mopemujakobiwal.pdfIn PDF document text
    • https://sixapinipuso.weebly.com/uploads/1/3/1/3/131384402/398952a9.pdfIn PDF document text
    • https://bazafegaxu.weebly.com/uploads/1/3/1/3/131383427/020e4302fd93e2.pdfIn PDF document text
    • https://vugifalufaduzo.weebly.com/uploads/1/3/4/8/134889855/7947cbea4daaa.pdfIn PDF document text
    • https://puvujoda.weebly.com/uploads/1/3/4/3/134326666/rasozopox.pdfIn PDF document text
    • https://bewanabexujafo.weebly.com/uploads/1/3/6/0/136050633/kowigokomuwulit.pdfIn PDF document text
    • https://webebusili.weebly.com/uploads/1/3/0/9/130969565/pivalepitivafova.pdfIn PDF document text
    • https://nanelovuw.weebly.com/uploads/1/3/5/3/135328611/laluji_rusigatov_namosuj_kadevedome.pdfIn PDF document text
    • https://seruborakumew.weebly.com/uploads/1/3/4/8/134849990/b669706b27b.pdfIn PDF document text
    • https://wamazuwo.weebly.com/uploads/1/3/1/3/131380988/e983c.pdfIn PDF document text
    • https://nojijakifon.weebly.com/uploads/1/3/4/0/134012839/3bb76c6.pdfIn PDF document text
    • https://zugatuwedi.weebly.com/uploads/1/3/0/8/130874050/4c1a7.pdfIn PDF document text
    • https://toredakiwireg.weebly.com/uploads/1/3/0/7/130739366/gutajitizorave.pdfIn PDF document text
    • https://futuziduxe.weebly.com/uploads/1/3/4/5/134508203/3797534.pdfIn PDF document text
    • https://xalojuxovev.weebly.com/uploads/1/3/0/7/130774978/b9900bfab5460.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://zudilazo.pbworks.com/f/fowibipikegalum.pdfIn PDF document text
    • http://xuruzinijub.pbworks.com/f/36049075581.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e50edbd8-6c11-4ec3-84c2-57ee3551f184/37689858451.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29e11a49-2546-4414-b263-43bfc7c15c34/business_process_outsourcing_definitie.pdfIn PDF document text
    • http://nikekuva.pbworks.com/w/file/fetch/144414246/slayer_leecher_v0_5.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA51 5708 bytes
SHA-256: c1e245e232fece656823e6815d044979ec9a46eb4e2042f57cda97c81a0ecef7
font_01_sfnt_off0000ed8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED8E 10228 bytes
SHA-256: 1aee5602c9ef4d19f6c531962da691a8be0b52cb9c9d570cb00293e621a5c418
font_02_sfnt_off000110ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110CE 16920 bytes
SHA-256: 2079d068ef84a1e18eb695779459a4906b3c39a3780afaab7ee1315eacf61140
font_03_sfnt_off000128d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128D5 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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