Malicious PDF — malware analysis report

Static analysis result for SHA-256 60ace90573022ee2…

MALICIOUS

PDF

76.6 KB Created: 2021-03-24 12:53:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 12bbe8c938394f40d1eaca9c8e7919a6 SHA-1: c2ea5466f5a8932881b3ef553c5e3603fc5b4392 SHA-256: 60ace90573022ee2cc3372b110675d67a509d61663c793a50c7b74316aaeb389
226 Risk Score

Malware Insights

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

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier. It contains a large number of external links, suggesting a link farm or phishing attempt. Notably, it includes a 'Clipboard command execution lure,' instructing users to paste content into a shell, which is a common technique for downloading and executing secondary payloads. The presence of multiple external URLs, including those on disposable hosting, further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://jumiwimov.ru/123?utm_term=hangouts++chat+history PDF link annotation
    • https://cdn.sqhk.co/zadorari/jbhiSid/gunimelos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463830/normal_605879bfc7b0d.pdfIn PDF document text
    • http://static-get.top/what_does_flip_a_word_meanya43h.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417652/normal_5fdaf9391b3e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493602/normal_604045a362e72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426812/normal_602c4f3c21c06.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416494/normal_6028fac1cddca.pdfIn PDF document text
    • https://cdn.sqhk.co/nulogoxeja/5VIhaie/konufozo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380545/normal_6046c6cef3356.pdfIn PDF document text
    • https://ninisajata.weebly.com/uploads/1/3/4/8/134869212/4e6e6221b5031d.pdfIn PDF document text
    • https://xavapijiwo.weebly.com/uploads/1/3/3/9/133997403/polopekaw.pdfIn PDF document text
    • http://premium-cinema.com/1869328096mthka.pdfIn PDF document text
    • https://cdn.sqhk.co/xufatirumina/jg4hbhc/8163935070.pdfIn PDF document text
    • https://cdn.sqhk.co/kapudome/gcC8jgj/30395976409.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467306/normal_5ffd538745382.pdfIn PDF document text
    • https://wigewowatabosaz.weebly.com/uploads/1/3/4/3/134352056/rometoj_zuwarijabibaw_repanuga_tisivufazigi.pdfIn PDF document text
    • http://trendmobile.ru/10568107433m36ye.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474722/normal_604893f144b8a.pdfIn PDF document text
    • https://cdn.sqhk.co/giwumazusew/aDEigjg/godazafuk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b322764d-3a89-4218-b2be-78859d6bc795/38954076840.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3441a51a-ab26-4ecd-a1f3-ec7b34c32f3b/89273119719.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d197a60c-2ce3-439a-8785-285dce5b5bdc/kaxojusazowifafemakof.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_off0000ed3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3B 5092 bytes
SHA-256: d8f28137a4b29bfa27d44695fd233d43057d4045dd4e2253b29a016e4031baee
font_01_sfnt_off0000fe92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE92 11212 bytes
SHA-256: 606faf7d516799f33f7c1f6fac84136c45f690cffb4079902e4c3f34fc792328