Malicious PDF — malware analysis report

Static analysis result for SHA-256 55c870e5eb1cdd99…

MALICIOUS

PDF

75.5 KB Created: 2021-01-27 14:59:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: d3c099b2238b31f0bddcbaec3228ed1d SHA-1: f99115c5bf0f806a9a0571dfec9f225e289dd3fd SHA-256: 55c870e5eb1cdd992d376dcebc113f76c967052eee42628336a7f51b202fd2ef
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File T1059.007 JavaScript

This PDF document employs a link farm and remote support tool lure to deceive users into downloading potentially malicious software. The document body, though heavily obfuscated, contains keywords related to earning money and job searching, likely serving as a pretext to encourage users to click on embedded links. The presence of numerous external links, many hosted on disposable domains, further indicates a phishing or scamming operation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://trafffi.ru/wb?keyword=steady%20find%20work%20earn%20money%20apk PDF link annotation
    • https://xozilozevaloda.weebly.com/uploads/1/3/5/3/135391373/e62d8bc7c.pdfIn PDF document text
    • https://cdn.sqhk.co/pategazikiw/hcifGgc/risosagur.pdfIn PDF document text
    • https://xirofagoxo.weebly.com/uploads/1/3/4/5/134576207/c139f3.pdfIn PDF document text
    • https://cdn.sqhk.co/vifutetax/jiiggje/rozevuwomimejusogobabus.pdfIn PDF document text
    • https://doruxajowivabog.weebly.com/uploads/1/3/4/8/134870444/zizenep-neleru-lusav-wakekopuvekadi.pdfIn PDF document text
    • https://cdn.sqhk.co/somisafeg/jisNigv/tags_for_social_likes_youtube.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381105/normal_60007797d25c3.pdfIn PDF document text
    • https://cdn.sqhk.co/sabeludejem/kFggHid/sunabuvedakodasibag.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366993/normal_5ff3a9310c558.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385635/normal_5ff76d9c8dfe6.pdfIn PDF document text
    • https://cdn.sqhk.co/kekoseni/o4zJjia/raboxotinuwusosukonesa.pdfIn PDF document text
    • https://cdn.sqhk.co/niserutom/iiieWgh/exonerated_definition_in_urdu.pdfIn PDF document text
    • http://norudumof.22web.org/hong_kong_visa_application_form_philippines.pdfIn PDF document text
    • https://cdn.sqhk.co/letinumi/jhkgdhg/clash_of_clans_generator_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451229/normal_5ff616f401af9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pasawe/high_flow_air_intake_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/fizup/visiting_card_design_psd_hd_free.pdfIn PDF document text
    • http://derekage.epizy.com/jio_phone_play_store_kaise_hoga.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_off0000eb6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB6B 5336 bytes
SHA-256: 5b7420faef1147202bf9379ef88211b16ddd804dcbef8f7b9cd2a06bfe990431
font_01_sfnt_off0000fda4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA4 10460 bytes
SHA-256: 881533631a5f8fea4df49f656a3dfd5c43a248a07e403b6f978386f32061bd96

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