Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a436f14d8c6c153…

MALICIOUS

PDF

74.2 KB Created: 2021-03-04 10:02:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 07a31ca65fa987d1162778755c6fe79b SHA-1: d195840275ae23b3b4ccd3f42ec4f45c690635f7 SHA-256: 4a436f14d8c6c153b3fc99397e90e04d5818a7a1e894600d07bbde57c39741b1
126 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. The document's content, disguised as a guide for obtaining a driver's license, is a common lure for phishing or malware distribution. While no scripts were explicitly extracted, the heuristic firings suggest malicious intent and potential exploitation.

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://xajibur.ru/wb?keyword=how%20to%20get%20a%20duplicate%20driver PDF link annotation
    • http://sodalabs.pro/how_to_tell_how_old_a_benelli_shotgun_iszdf0f.pdfIn PDF document text
    • http://faripofijukevom.mywebcommunity.org/botedibubipiginupades.pdfIn PDF document text
    • https://cdn.sqhk.co/xojapafe/86nkhdd/word_chef_answers.pdfIn PDF document text
    • http://tejovotemikodes.getenjoyment.net/xepopokelugivavifubab.pdfIn PDF document text
    • http://bellissimo.online/95660600511okn4l.pdfIn PDF document text
    • https://cdn.sqhk.co/lekibefefu/98Hthi3/bubble_mania_online_free_game.pdfIn PDF document text
    • http://berkeciftci.net/how_to_fix_my_gas_fireplace28eu0.pdfIn PDF document text
    • http://winoxolupuvil.getenjoyment.net/what_is_considered_non_western.pdfIn PDF document text
    • http://tapozifokun.mywebcommunity.org/zifabafagi.pdfIn PDF document text
    • http://nijalatol.mypressonline.com/41126017004.pdfIn PDF document text
    • http://usmileofficial.site/free_printable_happy_birthday_banner_templatesp6005.pdfIn PDF document text
    • http://fafesixokegigi.getenjoyment.net/how_to_find_mass_flow_rate_in_heat_exchanger.pdfIn PDF document text
    • https://zalozudipob.weebly.com/uploads/1/3/4/6/134673455/kamitonibemane.pdfIn PDF document text
    • http://porn77.design/how_to_write_about_a_sculpturecpmp2.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/mukutud/uri_full_hd_movie_counter.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/zagoxogenewozabug.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_off0000e50a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50A 5452 bytes
SHA-256: 34de472fec24c365b2d5845b42751b6fccc8f47773a2928e33612c27954274be
font_01_sfnt_off0000f7c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C8 10292 bytes
SHA-256: 0347743571c19fe3360c5d6965ac35c98f52d54a906ac25dbbc15116712cc36b

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