Malicious PDF — malware analysis report

Static analysis result for SHA-256 a24981a087e28257…

MALICIOUS

PDF

81.9 KB Created: 2021-03-20 07:09:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 92e1c8254bc1968302a8670d274a5854 SHA-1: a60b69faef52b64b502013e4c30780d3a08e8811 SHA-256: a24981a087e28257a7dd14e942ab29b13d10a1153987f2df2ca580da55463438
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9990

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 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.
  • 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://lozipotod.ru/123?utm_term=contract+management+spreadsheet+template PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367617/normal_604d2b588ab8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403560/normal_601681f9b0719.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411691/normal_5fee4531f3de1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454966/normal_603184143d031.pdfIn PDF document text
    • https://cdn.sqhk.co/domuzusud/g5UPzib/43304653447.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463551/normal_5fd84e213b124.pdfIn PDF document text
    • https://cdn.sqhk.co/zofonabiz/cZ2hegc/46352241318.pdfIn PDF document text
    • https://cdn.sqhk.co/raxinosi/hgha0jd/37965443701.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497372/normal_5fdd5a337c487.pdfIn PDF document text
    • https://cdn.sqhk.co/munemuzabuk/9Oiirhc/rulezubulo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469374/normal_5ffa22b327f0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386839/normal_602c61dfdae7c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367646/normal_5ffba510d268e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486997/normal_5ff22a2985764.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374013/normal_602eb7f89cf12.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://puwepubofixa.epizy.com/tufotenis.pdfIn PDF document text
    • http://pamapubosozule.epizy.com/kadambari_novel_in_marathi.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/60607530564.pdfIn PDF document text
    • http://nozoxolopoju.rf.gd/how_writing_works_with_readings_ebook.pdfIn PDF document text
    • https://s3.amazonaws.com/rewepalazamiso/airtel_cheap_data_plan_for_android.pdfIn PDF document text
    • http://lutidufewujasa.epizy.com/61112443163.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/25761339014.pdfIn PDF document text
    • http://dowupozor.epizy.com/19671967658.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/storyboard_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/vebubijanuv.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF411 5248 bytes
SHA-256: 783905cf70120cae7562907c97425135ef2e95b74e9d2508f63ac9c4e4905ff6
font_01_sfnt_off000105b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B1 10460 bytes
SHA-256: 7f546b377266b0a81de0c9f60d9088d4ce97c9ce95ba171156086926578e4f69
font_02_sfnt_off0001298a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1298A 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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