Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cee14595525b4b8…

MALICIOUS

PDF

86.6 KB Created: 2021-01-12 01:04:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: cc0e69b38c82ca5a7c1f784a6f329721 SHA-1: 4817ecc6de263652fe2cf30e751a186c4d26794c SHA-256: 3cee14595525b4b8c98350550e80606a7aa15d19b9f3b9fcd722f47ed1c834ec
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a large number of external links, many hosted on disposable domains, strongly suggests a link farm or phishing campaign designed to redirect users to malicious sites. The document body contains obfuscated text and metadata, further supporting a malicious purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • 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://traffset.ru/123?utm_term=currie+middle+school+yearbook PDF link annotation
    • https://viferoxabuged.weebly.com/uploads/1/3/4/2/134235394/lidakerej.pdfIn PDF document text
    • https://xivovawa.weebly.com/uploads/1/3/4/8/134875493/gafopupotavedep.pdfIn PDF document text
    • https://cdn.sqhk.co/ralapogifur/jjichhp/bearded_dragon_enclosure_temperature.pdfIn PDF document text
    • https://xuvuvigaxopezut.weebly.com/uploads/1/3/4/7/134721928/sowanobukibexej-potajivatot.pdfIn PDF document text
    • https://wozomeki.weebly.com/uploads/1/3/0/7/130776066/rozuza-ligavipaze-kokanazan.pdfIn PDF document text
    • https://zagefejov.weebly.com/uploads/1/3/2/7/132710748/xuzokija-vafivoko-kepuxelebetag-pegaj.pdfIn PDF document text
    • https://tebugusenaj.weebly.com/uploads/1/3/4/8/134870623/4efd9c517b9.pdfIn PDF document text
    • https://juvuxoxeziw.weebly.com/uploads/1/3/4/3/134313380/fexen.pdfIn PDF document text
    • https://sabiwivilo.weebly.com/uploads/1/3/4/3/134316676/7949924.pdfIn PDF document text
    • https://cdn.sqhk.co/nowovadizeb/thfjjQW/watch_tv_channels_live_free_android_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375690/normal_5fa81c793cfb3.pdfIn PDF document text
    • https://pekumovulimezel.weebly.com/uploads/1/3/4/3/134363026/diloluxaxutuka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380214/normal_5f8e9ad6ab78e.pdfIn PDF document text
    • https://cdn.sqhk.co/zupuguvawaj/pgdVjcr/fear_the_walking_dead_season_6_premiere_recap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0F 5392 bytes
SHA-256: ad254208d2c278ffdc3f3895d7dadf303dac61c7c8a3c5c3bfee70ad14750ee3
font_01_sfnt_off00011e31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E31 3720 bytes
SHA-256: 6539b129c5cd894636dc8f40f53a156c00c8f46378ab4f137c96d687a1cff6ed
font_02_sfnt_off00012994.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12994 10420 bytes
SHA-256: 63cbf4df23b16d531a4a3d3dfaf999fa4821cf1392fd2cbd913218f5dc90e783

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