Malicious PDF — malware analysis report

Static analysis result for SHA-256 c09dc4dcfa906d36…

MALICIOUS

PDF

73.9 KB Created: 2021-01-22 13:56:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 2ce0140bcee9c3a1f8403c8a6e70ed09 SHA-1: e63784bb3c3cd5b070288468e04f60cfae5fea28 SHA-256: c09dc4dcfa906d36666029bd1b8ada482d6a9fa5c824235d3b6874554f120213
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 or phishing operation. The ClamAV detection and ML classifier strongly indicate malicious content. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards a malicious intent to redirect users to potentially harmful sites, likely for malware distribution or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://trafftec.ru/123?utm_term=mini+militia+mod+by+sahad+ikr+unlimited+everything PDF link annotation
    • https://getiwojaxewife.weebly.com/uploads/1/3/4/0/134012456/6616757.pdfIn PDF document text
    • https://vozuviwugil.weebly.com/uploads/1/3/2/6/132681927/rurud.pdfIn PDF document text
    • https://sigogaxeba.weebly.com/uploads/1/3/4/6/134620414/6182ada80.pdfIn PDF document text
    • https://kuwiliwal.weebly.com/uploads/1/3/1/3/131378779/05113d.pdfIn PDF document text
    • https://komuwewolidixat.weebly.com/uploads/1/3/4/8/134871085/metunidunerigam.pdfIn PDF document text
    • https://site-1178373.mozfiles.com/files/1178373/74693492885.pdfIn PDF document text
    • https://site-1175676.mozfiles.com/files/1175676/21322330922.pdfIn PDF document text
    • https://site-1235963.mozfiles.com/files/1235963/easy_english_short_stories.pdfIn PDF document text
    • https://xaperosojemi.weebly.com/uploads/1/3/0/9/130969510/839fbb4072d4.pdfIn PDF document text
    • https://gebedosoxabitox.weebly.com/uploads/1/3/5/3/135324181/1124386.pdfIn PDF document text
    • https://vopasigujar.weebly.com/uploads/1/3/0/8/130813381/6977711.pdfIn PDF document text
    • https://site-1216802.mozfiles.com/files/1216802/evaluating_exponents_worksheet_kuta.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374374/normal_5fed104bcb18f.pdfIn PDF document text
    • https://pikoxujedogusu.weebly.com/uploads/1/3/4/6/134665618/riteveb-lozokipukemat.pdfIn PDF document text
    • https://nebakeji.weebly.com/uploads/1/3/4/6/134649015/patenefupafusukuwu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bajewilogofiro.epizy.com/84448180718.pdfIn PDF document text
    • http://mamisiz.rf.gd/girl_first_birthday_sheet_cake_ideas.pdfIn PDF document text
    • http://dogamesesokuj.rf.gd/avital_remote_start_4115l_installation_manual.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_off0000e1e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E5 5612 bytes
SHA-256: 09988929d18043fe53e47b565d0f9cdd66ac848f1adfc62afc19f053fa067663
font_01_sfnt_off0000f4e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E6 10992 bytes
SHA-256: 0f9e426a51c79df7092ee6f7f1806244fca4c56c07e6b2594bdc5160cc05b793

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