Malicious PDF — malware analysis report

Static analysis result for SHA-256 26b2ea721ef225be…

MALICIOUS

PDF

76.0 KB Created: 2021-03-27 23:48:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5052a3ddbe1a5897140f2f3300281f98 SHA-1: 112c0445f98a8a2231611a316442a5a6bd548fe8 SHA-256: 26b2ea721ef225be24beea46146ab8cc5c737fd67e3a5f5ed0247ed962fe8444
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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. 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 0.9999

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://xajibur.ru/wix?keyword=saga+sweet+evil+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4374196/normal_6000c24e829f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403563/normal_5feba30a9f464.pdfIn PDF document text
    • https://paleforekirito.weebly.com/uploads/1/3/4/5/134579508/900274.pdfIn PDF document text
    • https://pinababinazu.weebly.com/uploads/1/3/2/6/132695354/bajagikupigud-nufuguzujogepim.pdfIn PDF document text
    • https://baludofagufa.weebly.com/uploads/1/3/4/0/134096440/9bfcf18c.pdfIn PDF document text
    • https://zuligaxexepe.weebly.com/uploads/1/3/0/7/130775912/9665987.pdfIn PDF document text
    • http://kutufirix.iblogger.org/mamosowejox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471464/normal_6051b850d33c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500910/normal_5fe2c1df2aa98.pdfIn PDF document text
    • https://nozodipipagim.weebly.com/uploads/1/3/1/4/131438171/d185a0743708.pdfIn PDF document text
    • https://wuletalevuvefam.weebly.com/uploads/1/3/1/3/131379877/vimaru_jizipalezoz_fadibuzezuputi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://238a82c5-85a8-4641-a991-2f0f5270ddc4.filesusr.com/ugd/63f22d_c23c605ebcca441eaff9560239f118d9.pdf?index=trueIn PDF document text
    • https://441dbedc-201a-49d7-bb2a-292980023e2b.filesusr.com/ugd/473728_6f8c9a3fcfd441c383b1d2d0199db975.pdf?index=trueIn PDF document text
    • https://bc260b4e-efc2-469d-9102-9c7234992d76.filesusr.com/ugd/b1b3ad_989ecdd660fe48069b4e200000601d44.pdf?index=trueIn PDF document text
    • https://a1c9bafd-2917-4c1b-b79c-a4b44a941470.filesusr.com/ugd/f0f215_21cca5186bbc4082bace10257be5d513.pdf?index=trueIn PDF document text
    • http://mobosebobe.epizy.com/abap_for_hana.pdfIn PDF document text
    • http://favekagopu.epizy.com/oxford_companion_to_african_american_literature.pdfIn PDF document text
    • https://488c2ff9-9ff4-499e-8f11-525115e20b22.filesusr.com/ugd/8aba0c_2c2a0edbfd2144cea61738c5a9471f82.pdf?index=trueIn 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_off0000e96d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE96D 5368 bytes
SHA-256: f03c99c36ce392727e6e001960d25a61b708d92dcda3d728f724e34e0c2ed3c0
font_01_sfnt_off0000fbe1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE1 11628 bytes
SHA-256: de14844ab7e33891e242bacb315050e10963dbd5bc3dd418fea835ec6a0f1a81

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