Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eb7ea1d5055312c…

MALICIOUS

PDF

73.4 KB Created: 2021-03-03 04:51:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 578a7f3a53aae77d1898ae29e0d85cde SHA-1: b0d27b2d9edf4717d808802b56cab1fe6fcbae11 SHA-256: 0eb7ea1d5055312cfa1ed5b3336623e1acf4589b9097facdd1db3c56cb9315e8
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains embedded URLs that lead to a link farm, suggesting an attempt to redirect users to malicious sites. The presence of multiple external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/wb?keyword=tp%20link%20kasa%20smart%20plug%20apple%20homekit PDF link annotation
    • https://cdn.sqhk.co/doginifa/ie70jfO/fimovikuvadu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497685/normal_6037699a2f484.pdfIn PDF document text
    • https://cdn.sqhk.co/rivitovolu/jjJ6Ohj/ralisezilivuxubovogujinav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460057/normal_60286f3f804ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470221/normal_5fe90d262a6e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481158/normal_60310bafda41b.pdfIn PDF document text
    • http://vurovolapoza.mygamesonline.org/describe_the_amazon_rainforest.pdfIn PDF document text
    • http://xorimomupajo.scienceontheweb.net/zenabezofoxi.pdfIn PDF document text
    • http://kasaxeko.mypressonline.com/raxetijo.pdfIn PDF document text
    • https://cdn.sqhk.co/zukasedu/4kijBUQ/lerigawamu.pdfIn PDF document text
    • http://figimumagoko.mygamesonline.org/finders_keepers_movie_jim_carrey.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408346/normal_5fcca75f0f17c.pdfIn PDF document text
    • https://cdn.sqhk.co/naketego/4vulhhx/78147026457.pdfIn PDF document text
    • https://cdn.sqhk.co/lerapuraroke/jfshijg/regepen.pdfIn PDF document text
    • https://cdn.sqhk.co/suwinodujeja/6Gihjgi/rf_rgb_programmable_led_controller.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nanefelizili.epizy.com/1102434050.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_off0000e1f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F9 5244 bytes
SHA-256: 71a4e5b000029daa5745ab78403dfeaf838205a8a304ffaa441c09cd51b66f4f
font_01_sfnt_off0000f39f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39F 10800 bytes
SHA-256: 001e4b79b744a0e33129400c8966c2cc607214f725f231fdb853f4275e6e65d4

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