Malicious PDF — malware analysis report

Static analysis result for SHA-256 78dab682c210c23d…

MALICIOUS

PDF

78.6 KB Created: 2021-03-19 12:29:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 84fa731731dddcf2fc3a68f0ec18aea3 SHA-1: d6b396387b6a1baa635e1e9bd53e72cfb43085cd SHA-256: 78dab682c210c23d7bf8763064c756ebe3a35f2bbe50b263729aa433024d006d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious content, likely a phishing page or a download site.

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://ponafet.ru/strik?utm_term=6.0+powerstroke+engine+rebuild+kit
    • http://mivukiwoluwuj.iblogger.org/algorithms_unlocked_the_mit_press.pdf
    • http://vostokzapad.su/dell_latitude_7480_user_manualyz51s.pdf
    • http://dowakofevumamol.22web.org/rukakew.pdf
    • http://dujifasuda.iblogger.org/my_ti-84_plus_ce_wont_turn_on.pdf
    • http://vurujorifu.iblogger.org/smackdown_game_psp.pdf
    • http://turiwovezaz.iblogger.org/83083180832.pdf
    • http://xrootunited.com/apple_music_android_locationn8wp5.pdf
    • https://cdn.sqhk.co/ketejeti/igWjfij/wolopukesunujiw.pdf
    • http://mon-cmb.best/41201032836jrdst.pdf
    • https://cdn.sqhk.co/nedupugifuka/ZWL3Bc1/action_cam_live_stream_app.pdf
    • http://odebayitrafikhizmeti.com/how_to_use_iphone_4s_as_webcamimmyw.pdf
    • https://cdn.sqhk.co/mekibekowufe/hhhjjHO/loophole_definition_in_writing.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://041bbef9-4dd1-43b9-9ec7-2672afc16ec1.filesusr.com/ugd/686814_d9c9f6aa7f634f1b82919f50e261342e.pdf?index=true
    • http://wuzatefiroko.epizy.com/vajukunufamirodamuz.pdf
    • http://bikumekomem.epizy.com/bilingual_education_in_the_united_states.pdf
    • http://juxugalipexobow.epizy.com/go_math_grade_8_printable_worksheets.pdf
    • https://ab2ac9d4-4772-4872-829d-c19fde0a4f90.filesusr.com/ugd/b919b3_32a0e577611f47e2b9cf1d24babc5c53.pdf?index=true
    • http://supinam.rf.gd/jumbled_up_sentences_worksheet.pdf
    • http://gazezubutajon.rf.gd/sarcasm_and_irony_worksheets.pdf
    • http://mutunibe.rf.gd/fenujis.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_off0000f2d6.bin
b46043fd3421d5c2574bcb13338316f7f12552553bd7ab31b66193c488feeddf		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D6 5444 bytes
font_01_sfnt_off00010580.bin
29146ce41f68772ed7ac02ee18063349293ef0f0fee9a48868ee14908988b6f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10580 11456 bytes

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