Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0efdc7e0d8c245f…

MALICIOUS

PDF

77.1 KB Created: 2021-02-26 21:54:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3e1d6bda45ac24d0a714c0730b028da6 SHA-1: f4b3b12e9ada7cfc5ccafb1d13e792e9c5d5d8a7 SHA-256: e0efdc7e0d8c245f9df145263324667388ccfc84b18d93767db3ab87130017c3
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, including one that appears to be a link farm designed to redirect users to potentially malicious content, specifically disguised as a search result for 'watch jersey shore season 4 free'. The presence of multiple external URIs and a link farm structure suggests an attempt to redirect users to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/wix?keyword=watch+jersey+shore+season+4+free PDF link annotation
    • http://strapslap.online/zopafupowetetama4ah64.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368485/normal_5ff3ab10d31ad.pdfIn PDF document text
    • https://newekozowoni.weebly.com/uploads/1/3/0/7/130738578/2fc9293ba.pdfIn PDF document text
    • https://wididalinur.weebly.com/uploads/1/3/3/9/133986726/802383.pdfIn PDF document text
    • http://rgtuitp.ru/zanaloworunaribinqvxbg.pdfIn PDF document text
    • http://vevaxogejaz.scienceontheweb.net/how_to_use_the_super_snark_tuner.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/funny_writing_prompts_for_5th_grade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471959/normal_603686ba05b7f.pdfIn PDF document text
    • https://sakenudawajaka.weebly.com/uploads/1/3/4/5/134595508/e84e2681.pdfIn PDF document text
    • http://shoop-fp.ru/jekipufusejizewivoxi1fh0q.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
    • https://s3.amazonaws.com/nuruvapozixix/livew.pdfIn PDF document text
    • http://bigefen.rf.gd/android_mode_nokia_7_plus.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/pesitusakafe.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/mesukemoge.pdfIn PDF document text
    • http://zexenafejesited.rf.gd/honeywell_focuspro_6000_factory_reset.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_off0000e3ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3AD 4956 bytes
SHA-256: 0b25063e12755d1bb8193c99189fc6b0cce42e7829b668c05d177f76210ddef4
font_01_sfnt_off0000f495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF495 10840 bytes
SHA-256: acb97438460e924eca79e0dad908a067bb4679002b42afd40ccd1d6a4b303914
font_02_sfnt_off000119a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A3 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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