Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1f09f01c8f70cb5…

MALICIOUS

PDF

86.2 KB Created: 2021-03-19 09:45:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 75192b910ea1a83878b835b25db8da3b SHA-1: 716a572c19fde8a4210ecf3304fdfaf4c2609bcc SHA-256: b1f09f01c8f70cb5ac60c8344c3b9dbba306b9310c14c8bc92b101db25598203
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9967

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://seumenha.ru/123?utm_term=add+footer+to+worksheet+in+excel+2013 PDF link annotation
    • https://cdn.sqhk.co/jesovolavig/Fjhjcjg/31299270789.pdfIn PDF document text
    • https://cdn.sqhk.co/pasepizut/dnJVghq/30319093262.pdfIn PDF document text
    • https://nokojuponamipi.weebly.com/uploads/1/3/4/8/134891784/9179810.pdfIn PDF document text
    • https://cdn.sqhk.co/petebeki/jfcjqjc/86416662911.pdfIn PDF document text
    • https://cdn.sqhk.co/toriwogadej/GdijUje/51964361013.pdfIn PDF document text
    • https://vidokabotofasi.weebly.com/uploads/1/3/4/8/134868814/6065175.pdfIn PDF document text
    • https://cdn.sqhk.co/sarunasol/ZjjGghU/19733227435.pdfIn PDF document text
    • https://tiwudusakuwizir.weebly.com/uploads/1/3/1/6/131637104/fixezesibaz.pdfIn PDF document text
    • https://rulipativix.weebly.com/uploads/1/3/1/6/131607363/70aec8697b642aa.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/janodojivi/heather_morris_the_tattooist_of_auschwitz.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/56243038254.pdfIn PDF document text
    • https://2dcb0092-dd22-4cef-90c1-8c398f802bb7.filesusr.com/ugd/ff3115_f32eb2b0364d4dbea94e53dd65831ce0.pdf?index=trueIn PDF document text
    • https://38aad9b5-7a72-45b8-ac81-9fe73ce82000.filesusr.com/ugd/08338c_bcd4619004794524a363d7ac60039560.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/535fc732-30c2-49d3-a104-d1d5771fcfc0/2684737317.pdfIn PDF document text
    • https://s3.amazonaws.com/figidireki/capitalism_without_capital_espaol.pdfIn PDF document text
    • https://83372c7a-1065-4b07-8284-b64562b46e84.filesusr.com/ugd/035489_9d606a723dae4ef78bc06771e4755c45.pdf?index=trueIn PDF document text
    • http://fizesuduve.epizy.com/66972976801.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fa1de96-d3ea-45d5-8f6d-7a558497ed20/89395308363.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93644e51-cfd3-4ff9-a5db-cc603f0b2c8c/avadhuta_gita_portugues.pdfIn PDF document text
    • https://s3.amazonaws.com/regegozumekoza/75871305487.pdfIn PDF document text
    • http://fevukum.epizy.com/46038473115.pdfIn PDF document text
    • https://ba428ff1-d53d-4eb5-bdb2-cc960067f420.filesusr.com/ugd/7041e4_a320370911b845489323bfee58333cba.pdf?index=trueIn PDF document text
    • http://benipibidi.rf.gd/lewugubolemizavol.pdfIn PDF document text
    • https://2ddedb0e-b7b0-41c9-a8bc-c018bd0e6e4c.filesusr.com/ugd/70094d_23f1581e1ca747f5b4c7154d4e4464e0.pdf?index=trueIn PDF document text
    • http://kexojobozajase.rf.gd/characteristics_of_centrally_planned_economy.pdfIn PDF document text
    • http://ligunatiresid.epizy.com/muwobufefeselusuf.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_off00011350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11350 5604 bytes
SHA-256: 7f90db5ff36955be7467e55cb6da50df2f8cb5342ecf5bcdc31f2838fccc78e0
font_01_sfnt_off00012685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12685 10640 bytes
SHA-256: 494103cb0e49195778fb34b00739b4dc8b745c99e1cf6fd4e63ac16412ed9cae

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