Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fa6eb058f2bb2e7…

MALICIOUS

PDF

78.6 KB Created: 2021-05-11 19:56:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 612f3c0491c8ff751908113b37dfa278 SHA-1: 757193d4280d891fa55f5b6a077221f98801031f SHA-256: 2fa6eb058f2bb2e71393169c20aabe6caacfe68dac31d96084fc7d4ce11a513a
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to potentially malicious sites. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a tactic to obscure the true destination or distribute various lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://soxebez.ru/strik?utm_term=how+do+you+cook+pork+chops+on+a+george+foreman+grill PDF link annotation
    • http://kunewalijaxuna.getenjoyment.net/psychrometric_chart_high_resolution.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493610/normal_603b31ab30924.pdfIn PDF document text
    • http://instas.site/99367783142w3wej.pdfIn PDF document text
    • http://dontbeshy.xyz/simplifying_algebraic_fractions_worksheet_easyyjvs5.pdfIn PDF document text
    • http://tb-films.ru/best_old_school_italian_restaurants_near_meqfo7l.pdfIn PDF document text
    • http://sale50.pro/how_to_install_kali_linux_tools_on_ubuntuickly.pdfIn PDF document text
    • http://13millions.store/creative_writing_curriculum_guide_depedsc2fq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382429/normal_5fc760e940636.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462694/normal_5feddb5701f8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386081/normal_600a4b7fcf1a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409123/normal_6024279c3bea5.pdfIn PDF document text
    • http://leaninrzpd.site/wepow5zyp1.pdfIn PDF document text
    • http://lomigakorak.getenjoyment.net/70507576052.pdfIn PDF document text
    • http://vasizazesunof.medianewsonline.com/population_characteristics_ecology.pdfIn PDF document text
    • http://gekifek.scienceontheweb.net/occupational_safety_and_health.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369163/normal_5fe99d02cbc0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488837/normal_6054226c42592.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426557/normal_606b84766732d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426280/normal_5fc97b5f05a72.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8ed7bbb-5cea-422c-afdd-fe37b7d7ccfa/tipab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e284a438-6351-4b44-9427-20d150c762dc/hp_lj_pro_400_m401d_driver.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2234dbd5-ddc6-4717-84df-950d24da5ab4/ladulixozonatewerewi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a302fcd0-5767-4a31-8ebc-5a3cf9cdb8ec/wordpress_admin_login_url_change_plugin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4dfa3a5-7243-419c-bc09-58810c71352a/jetblue_ipo_valuation_case_study.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_off0000f385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF385 5788 bytes
SHA-256: 1563e6a9db509cb759163f24506b57446ba61fc47523bc9340e431c942478b25
font_01_sfnt_off00010728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10728 10832 bytes
SHA-256: f816760c513804291ddeab5d4ee222b3e2144bca4bce667bbd6738b866c8bce3