Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee952e76483a0e2e…

MALICIOUS

PDF

75.7 KB Created: 2021-04-30 04:42:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a33cd632aeb7a6c211f2205c3ecd7815 SHA-1: c4446db1c06b74da7a0d16000fe69125e7d8ec5d SHA-256: ee952e76483a0e2ed180ef0e1f4de2d6bc09f3fd717bfdfd7a24b6a8490c76d2
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though obfuscated, suggests a lure related to IT interviews, likely to direct users to malicious sites for further exploitation. No scripts were extracted, but the PDF structure and URL analysis strongly indicate a phishing or redirection attack.

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://ponafet.ru/strik?utm_term=how+to+prepare+for+an+it+recruiter+interview PDF link annotation
    • http://medemukiduba.sportsontheweb.net/81905703437.pdfIn PDF document text
    • https://cdn.sqhk.co/nofatazor/hghfjgg/buick_enclave_2008_manual.pdfIn PDF document text
    • https://cdn.sqhk.co/roretuduva/VIifBii/68288330097.pdfIn PDF document text
    • http://lianhua.life/575807448136by1p.pdfIn PDF document text
    • http://ridunculus.com/living_sober_book87e6j.pdfIn PDF document text
    • https://cdn.sqhk.co/dedizozife/ghvrAd5/fubisavomifin.pdfIn PDF document text
    • http://ripotomip.iblogger.org/coller_plusieurs_en_un_seul.pdfIn PDF document text
    • http://lixorajepidil.mygamesonline.org/alcatel_fierce_4.pdfIn PDF document text
    • http://vykupavto54.ru/miss_universe_1994_question_and_answer6vqqu.pdfIn PDF document text
    • https://cdn.sqhk.co/divoxisig/xgdjjOP/ordinary_skincare_quiz.pdfIn PDF document text
    • http://kagiburof.iblogger.org/how_to_burn_fat_with_resistance_bands.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwefuxab/ghMA19s/geladukadolutibugali.pdfIn PDF document text
    • http://sberbank.link/integral_inmediata_arcotangentexkxpq.pdfIn PDF document text
    • http://myfirstsite.xyz/red_sunrise_lord_of_the_ringsmppoz.pdfIn PDF document text
    • http://sepukolobu.sportsontheweb.net/super_mario_land_dx_2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mipagolawalixa.onlinewebshop.net/dezezadusozore.pdfIn PDF document text
    • http://vudemiziwifimo.epizy.com/resetozinoxu.pdfIn PDF document text
    • http://lufafutogixafu.rf.gd/jimizonilutalok.pdfIn PDF document text
    • http://vakizonozajaxe.onlinewebshop.net/sosujulemijonodeninixuf.pdfIn PDF document text
    • http://bekusisit.atwebpages.com/41312903806.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_off0000ecb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB2 4912 bytes
SHA-256: 666d51f3733ea593e635914d784a82653000cd57c83fbb01bd0161f96c69ba7e
font_01_sfnt_off0000fd91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD91 10632 bytes
SHA-256: ab732c91d3148adfba93cc7a1e5baed8915d6737177fa41f701d78d84e6b7c84

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