Malicious PDF — malware analysis report

Static analysis result for SHA-256 d04f82e542eb6c96…

MALICIOUS

PDF

96.0 KB Created: 2021-03-12 20:44:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: ae92ff7dc4ffa91052f14f6ca89271ae SHA-1: d2ff57ac633ee439d087d50693af6cb286e81ec3 SHA-256: d04f82e542eb6c96063e1bf3b2ede5d409bc5962ed62e6000d2aa76aacef4f06
126 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a URL with a 'utm_term' parameter further supports a phishing or spam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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 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://maypoin.ru/123?utm_term=arcade+fire+reflektor+full+album PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387919/normal_6022a03c5acad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368475/normal_5ff79d174cbd9.pdfIn PDF document text
    • http://nomudepalak.medianewsonline.com/26133607935.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464722/normal_6046e2212d308.pdfIn PDF document text
    • http://dom-bita.org/43027635088ap33.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385012/normal_5fe2d6da827a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464065/normal_60179576e15e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367624/normal_5fe8149df1462.pdfIn PDF document text
    • http://wigomufeze.22web.org/rabinusu.pdfIn PDF document text
    • http://lnstagram-helping-centre.com/14675859717ldpwk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496602/normal_6012cdd7c8b6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403271/normal_5fd641775841a.pdfIn PDF document text
    • http://unosital.space/amy_tan_mother_tongue_rhetorical_deviceszvbhh.pdfIn PDF document text
    • http://muwusus.iblogger.org/19029228908.pdfIn PDF document text
    • http://kurixuj.sportsontheweb.net/management_science_the_art_of_modeling_with_spreadsheets_solutions_manual.pdfIn PDF document text
    • http://muzomabavima.medianewsonline.com/zidufizarapinazi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378604/normal_600776075625e.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
    • https://s3.amazonaws.com/devuxuzejozam/79804531080.pdfIn PDF document text
    • https://s3.amazonaws.com/busutafitufe/ssb_crack_cds_2_2019_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/zisulamisozoto/ccna_security_lab_guide.pdfIn PDF document text
    • http://guvonudigadosa.epizy.com/32855315689.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_off00012bf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BF0 4956 bytes
SHA-256: 0d2c038ad10b6be0fb60489c5827b5d82a1db6c83e0405c2b296bbceff9a203e
font_01_sfnt_off00013cc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CC7 12248 bytes
SHA-256: 28b9174aba7323d7d58482ca32bde43dfe7902b2058ff4ba82a15794d7aebbe6
font_02_sfnt_off0001642b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1642B 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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