Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a780b92b131e853…

MALICIOUS

PDF

76.0 KB Created: 2021-03-04 11:39:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6cbda3b53ac88d113e0bb70eac49ce9f SHA-1: 29f803bd647fdc77d01b84834a2f59d69fae0b9c SHA-256: 0a780b92b131e853607bdd19250685706d0a2fa27afcd992ad1b9d5d7f6c5fa2
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of an attempt to redirect users to malicious content, likely for malware distribution or credential harvesting.

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://zajinet.ru/123?utm_term=how+to+turn+on+waterfall+in+hot+tub PDF link annotation
    • http://legionmone.xyz/alan_watts_overthinkerorul7.pdfIn PDF document text
    • https://cdn.sqhk.co/voduzetefir/yigoicT/android_launcher3_source_code.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390097/normal_6005b67e717a2.pdfIn PDF document text
    • https://cdn.sqhk.co/tosobulig/Yjcific/commuter_cars_tango_sahibinden.pdfIn PDF document text
    • http://fredo.bike/bebatawugolutezomosomajag4mumq.pdfIn PDF document text
    • https://xifalazixaxidig.weebly.com/uploads/1/3/0/8/130874217/23f974.pdfIn PDF document text
    • https://dixatobuvug.weebly.com/uploads/1/3/5/3/135321084/tisabudikiru.pdfIn PDF document text
    • https://laxepesijuniz.weebly.com/uploads/1/3/1/3/131383562/xosedozegi-ridodi-gakilino.pdfIn PDF document text
    • https://cdn.sqhk.co/nedabuke/0ChUgcG/49231521514.pdfIn PDF document text
    • https://numemepo.weebly.com/uploads/1/3/0/9/130969514/gibat.pdfIn PDF document text
    • https://vazonani.weebly.com/uploads/1/3/1/8/131871537/1959854.pdfIn PDF document text
    • https://nojonepidafajik.weebly.com/uploads/1/3/0/7/130775859/617ad6ad5f0.pdfIn PDF document text
    • https://wezuzaxularo.weebly.com/uploads/1/3/1/4/131406207/tekikazizixuze_lopafeduzid.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/devuxuzejozam/nj_transit_bus_schedule_158.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/93132158200.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/98228458948.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/xuvavalopufofesimifanamil.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_off0000ede7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE7 4868 bytes
SHA-256: d8897548d275d3aac9092fc1a4d2825e9ee4db92a768e58c454c6dae976855d0
font_01_sfnt_off0000fe7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7C 10740 bytes
SHA-256: 2bb9fe1d37b4e807dd5ec2a747a07c68a8426e71b486d4f6fda0f2a3cb3b631c

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