Malicious PDF — malware analysis report

Static analysis result for SHA-256 70d10a202c2920c6…

MALICIOUS

PDF

74.1 KB Created: 2021-01-10 03:43:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: cb4ece2a35f6b308c65b5fdf6e6502a0 SHA-1: d62bec3f745422c4d1550ef2630a47ffbb5ae0d9 SHA-256: 70d10a202c2920c606b3863261bc1173b873c633d8cc5918d5d52f1d6fcb3d93
184 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to known malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though truncated and obfuscated, suggests a lure related to 'Datastage interview questions pdf'. The ML classifier and ClamAV detection strongly support its malicious nature, likely serving as a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffking.ru/123?utm_term=datastage+interview+questions+pdf In PDF document text
    • https://tanutalavisa.weebly.com/uploads/1/3/4/0/134000413/newudebolakufemez.pdfIn PDF document text
    • https://varodapomibaga.weebly.com/uploads/1/3/4/8/134874415/pimelivamolun.pdfIn PDF document text
    • https://minunelojob.weebly.com/uploads/1/3/1/4/131453060/vemepodewuxorigefu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368251/normal_5f9d0530282d4.pdfIn PDF document text
    • https://cdn.sqhk.co/pepitaji/CYhehiL/rocket_launcher_gungeon.pdfIn PDF document text
    • https://radutarogo.weebly.com/uploads/1/3/4/3/134379411/sasukesojiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366024/normal_5f870ed24ff13.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447641/normal_5fde9a9f530c5.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/baritexovopa/anti_malware_for_mac_free.pdfIn PDF document text
    • https://s3.amazonaws.com/timituvupame/kopopalafapogagameg.pdfIn PDF document text
    • https://s3.amazonaws.com/rerinago/70697830811.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_off0000e572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE572 5456 bytes
SHA-256: ccdb0794b029036d79da18d9643dc292dfd54e8b1b91502f59f9310bd56fb997
font_01_sfnt_off0000f827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF827 10552 bytes
SHA-256: ba226a36e0596207eb756d35df0024524aec687f36197cdc044c92a312c8e785

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