Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b846e0eafe9a465…

MALICIOUS

PDF

82.1 KB Created: 2021-03-19 19:12:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2339594fd1acd42d821d43f2484d940e SHA-1: 990b43aba1a199eb6802c589bcc79710318a4891 SHA-256: 9b846e0eafe9a46594ff905a9292162d73595e957b82c8a3af45bde52feaff4e
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 0.9996

Heuristics 5

  • 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 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://golowaki.ru/wix?keyword=manual+labview+core+1 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388827/normal_6017cf55ec3c3.pdfIn PDF document text
    • https://javagakikidubat.weebly.com/uploads/1/3/0/9/130969576/b01f9c32c27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446491/normal_6051bc292942f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411702/normal_6005997531ef9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375344/normal_6024801fdb195.pdfIn PDF document text
    • http://nimojojisox.22web.org/49816496261.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419849/normal_5ff2a6057b0b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418185/normal_6013bcb3f2b30.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496380/normal_5fc621ce2e66c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383797/normal_60234ca2e9035.pdfIn PDF document text
    • https://sedozexejelem.weebly.com/uploads/1/3/1/8/131871533/6442941.pdfIn PDF document text
    • https://jamudavepavu.weebly.com/uploads/1/3/5/3/135324372/c91f4cde974714.pdfIn PDF document text
    • https://xanusikufugab.weebly.com/uploads/1/3/4/3/134371049/bojuto.pdfIn PDF document text
    • https://lorufolirosob.weebly.com/uploads/1/3/4/5/134584190/bewatumotosuduzebes.pdfIn PDF document text
    • https://novagonuneji.weebly.com/uploads/1/3/1/4/131483078/5067078.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421217/normal_603a14bf511f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450427/normal_5ff1cdfca0e74.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dafitigare.epizy.com/wugokavofoxepedod.pdfIn PDF document text
    • http://jizutuboluv.rf.gd/32450224185.pdfIn PDF document text
    • http://xijevilofut.rf.gd/health_and_safety_coordinator_salary_ontario.pdfIn PDF document text
    • http://zinipaxafuzonik.rf.gd/because_of_miss_bridgerton_free_download.pdfIn PDF document text
    • http://bit.ly/2eM3faQIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE0D 4964 bytes
SHA-256: 4a22799920add19ece22b87b51c2f7592c089b6ce3a5335256fb5a178b37bc08
font_01_sfnt_off00010f25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F25 13200 bytes
SHA-256: 1667f2cd6ed49ae4d42c3ae38985c0632550a50033b1823357a17fb09899be46

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