Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9119bf74040434c…

MALICIOUS

PDF

77.0 KB Created: 2021-03-24 15:15:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ca8e451412798e2277c57fc34251fa7 SHA-1: 27ff4ea6c1401adaf0b31958e11006a0d59ffb0a SHA-256: f9119bf74040434cfd99b4fefbf398288cdceab3c9dfa69307638a638295a5cf
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and is flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, contains text related to clearing browsing history, which serves as a lure to direct users to malicious domains like dafemum.ru. The presence of multiple external URIs and link farm heuristics further supports the phishing and malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://dafemum.ru/strik?utm_term=clear+google+browsing+history+on+iphone
    • http://farijizibeke.iblogger.org/61503611230.pdf
    • https://cdn-cms.f-static.net/uploads/4476927/normal_6009f5202e48b.pdf
    • https://cdn-cms.f-static.net/uploads/4405206/normal_6015e5e35c6ca.pdf
    • https://fabuduviwanor.weebly.com/uploads/1/3/4/7/134739750/xasamuv.pdf
    • https://wadenipix.weebly.com/uploads/1/3/1/4/131408068/9493903.pdf
    • https://bonopabugo.weebly.com/uploads/1/3/4/5/134581776/fuxiji.pdf
    • https://cdn.sqhk.co/kuzetuzame/hiifaOR/78987681399.pdf
    • https://cdn-cms.f-static.net/uploads/4493888/normal_60485dc0c83a8.pdf
    • https://varowuzogan.weebly.com/uploads/1/3/1/8/131856285/wudusonadijobuzifu.pdf
    • https://static.s123-cdn-static.com/uploads/4499972/normal_5fd03d503860f.pdf
    • https://poturifipejo.weebly.com/uploads/1/3/4/7/134767967/182d02.pdf
    • https://cdn.sqhk.co/gefeloxo/cjbibPb/99418329233.pdf
    • http://palifagumelu.22web.org/a_b_c_alphabet_video_free.pdf
    • https://cdn.sqhk.co/nebafori/Ejiibji/como_facturo_mis_recargas_telcel.pdf
    • http://xiduterixiwu.22web.org/cards_against_humanity_expansion_2.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c9b6d766-5c7c-48df-a4c9-a785d6dfb6ab/35614254108.pdf
    • http://lolowavedipugis.rf.gd/97084623206.pdf
    • https://uploads.strikinglycdn.com/files/d823ef94-d10a-4dc4-8f71-77fa4db80d7a/nanipe.pdf
    • https://uploads.strikinglycdn.com/files/b09d54f6-cf43-4f9c-a452-bb9f894ed780/terapia_cognitiva_conductual_o_psicoanlisis.pdf
    • https://uploads.strikinglycdn.com/files/2e1622a7-0011-4a67-ba1e-a764bc0a13ba/what_does_no_bootable_device_mean_on_an_acer_laptop.pdf
    • https://s3.amazonaws.com/lomogas/4949211298.pdf
    • https://s3.amazonaws.com/rimepusox/american_government_and_politics_today_2016-17.pdf
    • https://uploads.strikinglycdn.com/files/c75eff19-462d-4675-9cd8-700e48df2b74/action_verbs_worksheet_5th_grade.pdf
    • http://runuvabono.rf.gd/55370837411.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee63.bin
eb83112023ccd3e2a977465d481ce15c8deedc21fe9293a70a0ce38ca3d4cd2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE63 5320 bytes
font_01_sfnt_off00010088.bin
c862c2a25accbed5c58c1e04538c2d18f87039d318720b3637d193c4b4537627		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10088 11256 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.