Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e1b21a92a107dd0…

MALICIOUS

PDF

75.2 KB Created: 2021-02-22 07:59:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: be64c6e9c6bac153c4b3a11a174ebb34 SHA-1: 0a476006987d1bb81672e112351eeb39cdd0ef93 SHA-256: 2e1b21a92a107dd08d44c3896d28d59e5779014183eb320c0b882cdde2481975
244 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier. It contains a large number of embedded links, many pointing to disposable hosting or redirector infrastructure, suggesting a link farm or phishing campaign. The document body, though heavily obfuscated, contains text related to car battery chargers, which may be a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://crophysi.ru/123?utm_term=how+do+i+know+if+my+car+battery+charger+is+working In PDF document text
    • https://nadenekaf.weebly.com/uploads/1/3/0/7/130739264/4137046.pdfIn PDF document text
    • http://loberas.22web.org/square_1_art_signature_template.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496586/normal_600af9cfb2f70.pdfIn PDF document text
    • https://cdn.sqhk.co/gidulikegel/mjjQkgh/real_car_driving_simulator_mod_apk.pdfIn PDF document text
    • https://zezowamizafomex.weebly.com/uploads/1/3/1/3/131381240/bb7d470eb21ae.pdfIn PDF document text
    • https://cdn.sqhk.co/wodaximewule/5Jy8tPL/cool_keyboard_fonts_for_ipad_free.pdfIn PDF document text
    • https://cdn.sqhk.co/fatepotax/bpdmSWK/dududofibexokifu.pdfIn PDF document text
    • https://pigikitukapu.weebly.com/uploads/1/3/4/6/134693564/tiwetaku_piton_fogetime_bedaf.pdfIn PDF document text
    • https://niraniki.weebly.com/uploads/1/3/4/6/134662237/7282427.pdfIn PDF document text
    • https://cdn.sqhk.co/dawupana/bigiaie/gladiator_heroes_arena_sword_fighting_tournament_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/soxemudu/ghdgdpk/google_sheet_accounting_template.pdfIn PDF document text
    • https://faxasuxudoxo.weebly.com/uploads/1/3/2/6/132695360/315747.pdfIn PDF document text
    • https://karaxofuko.weebly.com/uploads/1/3/5/3/135344752/joxunitik.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxapivasif/4NPNggF/motorola_razr_5g_t_mobile.pdfIn PDF document text
    • https://cdn.sqhk.co/fusaduxuw/N3hjPr6/download_org_2021_mod_vip_apk.pdfIn PDF document text
    • https://wotigutaz.weebly.com/uploads/1/3/4/3/134361511/8471e85a.pdfIn PDF document text
    • https://litukepulaj.weebly.com/uploads/1/3/4/8/134863372/meragotoloje.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vetizonudaxow.epizy.com/dazowovabikadebifexupot.pdfIn PDF document text
    • http://rejeremonuwiz.rf.gd/addition_equation_and_conclusion_answers.pdfIn PDF document text
    • http://jibufunipibavu.rf.gd/athens_georgia_weather_report.pdfIn PDF document text
    • http://bikikifuxax.epizy.com/90276627982.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_off0000e778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE778 5760 bytes
SHA-256: d0b1f757786cf49581015975153ef15bfaf2e42a7eb33855008461e9562b4c30
font_01_sfnt_off0000fb04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB04 10636 bytes
SHA-256: 5456a67c46a4645c9634fa5f12954473b3428afbb8c2647acb43725bbd86ea0c