Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b7d0e17bb7fd66d…

MALICIOUS

PDF

81.7 KB Created: 2021-03-02 07:09:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 00eeeff6eb3c5c4955aa599dab42c800 SHA-1: a297444465ad813c13430a8ae18fcf8e589436eb SHA-256: 1b7d0e17bb7fd66d0c59d895675af1d4f6c6fc3a42116b041af814719fd3af3f
254 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with several pointing to known malicious redirector infrastructure and a link farm. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' and 'PDF_SEO_LINK_FARM' strongly indicate malicious intent. The ML classifier also flagged this PDF with high confidence. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest a phishing or malicious redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://yafferge.ru/strik?utm_term=how+to+use+a+mr+coffee+grinder In PDF document text
    • https://nilelaji.weebly.com/uploads/1/3/0/7/130775665/4981989.pdfIn PDF document text
    • http://lemiritafuwab.22web.org/10937151597.pdfIn PDF document text
    • https://kolijegidixut.weebly.com/uploads/1/3/1/3/131379325/5804472.pdfIn PDF document text
    • https://lozibojugor.weebly.com/uploads/1/3/1/0/131069840/zoxuvinawowizoxodiz.pdfIn PDF document text
    • http://groshyk.site/how_to_curl_with_a_flat_iron_weavezcoxp.pdfIn PDF document text
    • https://lesinaxalurivox.weebly.com/uploads/1/3/1/3/131398335/d8281.pdfIn PDF document text
    • https://dulewexafup.weebly.com/uploads/1/3/4/7/134702005/9e57c7.pdfIn PDF document text
    • http://mastera-saydinga.ru/14331954480e8u6r.pdfIn PDF document text
    • http://bigops.fun/what_are_the_qualitative_and_quantitative_data_collection_methods367dy.pdfIn PDF document text
    • https://zudejafig.weebly.com/uploads/1/3/2/6/132681624/3302541.pdfIn PDF document text
    • https://gafojeted.weebly.com/uploads/1/3/1/4/131452963/6266057.pdfIn PDF document text
    • https://kozezivu.weebly.com/uploads/1/3/4/4/134444222/9634986.pdfIn PDF document text
    • https://s3.amazonaws.coIn macro / runtime command snippet
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/hypertensive_urgency_and_emergency_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/how_trees_combat_climate_change.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/poxutajuwa.pdfIn macro / runtime command snippet
    • https://s3.amazonaws.com/risisipajole/20214715500.pdfIn PDF document text
    • http://tasopawak.rf.gd/bionicon_c._guide_eco_chain_tensioner.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

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_off000102ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BA 5360 bytes
SHA-256: 9120f558e9d89f9a30e5d3cb3ad477ca1237c683691a4de9cbebf97e102404e3
font_01_sfnt_off000114ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114ED 10924 bytes
SHA-256: 0c48df637a144e1edb5275daddb7fddb0c42596f1613aff8b3b1ecc23f9c55f1

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