Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaa3bc96f48e8b06…

MALICIOUS

PDF

74.3 KB Created: 2020-11-13 11:01:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c89571b303b2e369e094a92eec1bc469 SHA-1: b3dbcc5391e7f723079f6ba7bef62fc8ef77245f SHA-256: eaa3bc96f48e8b069c1921e5039fe6fb108f0166b81ee71b47d37c8a3b886bcb
156 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 0.9995

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 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.
  • 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://trafficel.ru/strik?utm_term=kaal+sarp+dosh PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386842/normal_5f903b7d727d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393370/normal_5f90b2deeec77.pdfIn PDF document text
    • https://lisefemibumosu.weebly.com/uploads/1/3/4/3/134339955/8659590.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414335/normal_5fa8a65bf1b6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457320/normal_5fa575f8e1bc5.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/81b90f4420.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369158/normal_5f9125921aa51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368760/normal_5fa6d7d330743.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/zidenigad/ximevogiwowokur.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/68004975693.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ab85a24-0223-4d1c-a1bd-5ebc4b419db1/mavodovomu.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC531 5016 bytes
SHA-256: 6bef02294de3629cf5ffaffbd1ee102d160d1328742ee8d7930ab1ce853bc5dd
font_01_sfnt_off0000d633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD633 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_02_sfnt_off0000e196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE196 10776 bytes
SHA-256: f2bb6393e141e8ddd9532cf2fff4d74176a47fe1490bc462df5129fb46eb5d2e
font_03_sfnt_off000104f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F3 6636 bytes
SHA-256: 53e373671dda0ae6130c6066362c24244481db093bbb1602d8161d29f479951f

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