Malicious PDF — malware analysis report

Static analysis result for SHA-256 01b064137eb0cd86…

MALICIOUS

PDF

69.9 KB Created: 2020-11-10 09:58:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 70a5bebc8eeda6d3662f1610b44e9d79 SHA-1: 1ddddf4ed0df198a2d081763fc42e70b56946828 SHA-256: 01b064137eb0cd860c3d9b3a37f2dffa6874384b091ac0c32fe9c183f82777a4
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. 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 0.9998

Heuristics 7

  • 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.
  • 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.
  • 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://trafficel.ru/strik?keyword=free+minty+pickaxe+codes+real PDF link annotation
    • https://tipefejiri.weebly.com/uploads/1/3/0/9/130969755/3820269.pdfIn PDF document text
    • https://sixodajumam.weebly.com/uploads/1/3/4/3/134311071/7700085.pdfIn PDF document text
    • https://kavanezeso.weebly.com/uploads/1/3/4/4/134477356/rebile.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474462/normal_5fa9e849a3422.pdfIn PDF document text
    • https://pavowojavujide.weebly.com/uploads/1/3/1/3/131398322/9677244.pdfIn PDF document text
    • https://patilufadan.weebly.com/uploads/1/3/4/4/134462925/nowopavugujer.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/rezugekolaba/58189312724.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/city_of_ember_graphic_novel_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f87c122-bfcc-48e9-8900-b30ec3d50d43/alessia_cara_stay_mp3_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/040b92c3-8f04-4dfd-a5e8-233766dec0bc/abiotic_and_biotic_factors_of_taiga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b78a0b37-7a5a-4896-a721-72e7236cd535/bloons_td_4_expansion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec7e03b4-644b-45e0-989c-70e95615ac63/xenoblade_chronicles_iso_pal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c475544-2a02-495b-96a2-7ffacc3c820c/ridetibawuzemiko.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/voropijujimawabofirewe.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_off0000d0f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0F2 5408 bytes
SHA-256: 864b777af36291f83a684f87a6d212263cf0fc3755b7395e2ba19ee7471e5601
font_01_sfnt_off0000e353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE353 12476 bytes
SHA-256: 0b91df65f18fbfa411aa8983809381647d3fb817f5021a8dd5236edaaf134789

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