Malicious PDF — malware analysis report

Static analysis result for SHA-256 61fec8138af3060e…

MALICIOUS

PDF

78.4 KB Created: 2021-03-28 19:32:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 626f441a0b8bd811540cfbe118ac61d8 SHA-1: 298062ec50ecdfe8c3697b3288fbc1fa150a5110 SHA-256: 61fec8138af3060e7ee2680023250b95fd06603fe37de120db1a5c857082ab12
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs that point to external sites, suggesting it functions as a link farm or a distribution point for further malicious content. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' reinforces this assessment, indicating a deliberate attempt to obscure or distribute malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://fokemale.ru/strik?utm_term=modo+de+produccion+esclavista+caracteristicas+sociales PDF link annotation
    • https://cdn.sqhk.co/dodidubi/ekUoje5/salojesosuv.pdfIn PDF document text
    • https://cdn.sqhk.co/lixabanitav/iggfjIK/dasigo.pdfIn PDF document text
    • http://trysoda.pro/mizutevarisonimun5jsj4.pdfIn PDF document text
    • http://harkateine.fun/mofekakejibepasepumil2pg5f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464055/normal_5feec9d2e4dc2.pdfIn PDF document text
    • https://tiwuvaxitunux.weebly.com/uploads/1/3/0/8/130874175/1dc17cd5465e2.pdfIn PDF document text
    • https://menudapopejit.weebly.com/uploads/1/3/0/7/130775932/81516e50597b7.pdfIn PDF document text
    • http://digitalcalakk1.xyz/best_french_door_counter_depth_refrigerator_2018djsa4.pdfIn PDF document text
    • https://mojibivod.weebly.com/uploads/1/3/4/4/134490358/ruritukubasafa-jemulididin-gabopuvimabi-befulox.pdfIn PDF document text
    • http://3gusevshop.space/82249091159uu3x6.pdfIn PDF document text
    • http://helpcreditscore.info/vipamujorixogupyckar.pdfIn PDF document text
    • http://ru-payment.casa/is_it_worth_buying_a_refurbished_kitchenaid_mixerum86o.pdfIn PDF document text
    • https://zazafiwizodizi.weebly.com/uploads/1/3/4/0/134041258/ce5b07e883.pdfIn PDF document text
    • https://jefamiwufilidiv.weebly.com/uploads/1/3/1/4/131409158/5e9fe52fb.pdfIn PDF document text
    • https://cdn.sqhk.co/bemaxopig/jahjkig/jafiwobulofolapizaza.pdfIn PDF document text
    • https://wexaluzeneroxer.weebly.com/uploads/1/3/0/7/130776054/tiroruzu_vasevegaj_zotirakofani_jowogarefapov.pdfIn PDF document text
    • http://prizinsta24.site/why_does_my_rca_tablet_keep_turning_off6enfi.pdfIn PDF document text
    • https://fusofopafufet.weebly.com/uploads/1/3/5/2/135294951/1b0d4.pdfIn PDF document text
    • http://ampinternational.org/63723023188tqxd8.pdfIn PDF document text
    • https://cdn.sqhk.co/lolatonuvesa/Kgf7gjC/android_system_webview_download_pending.pdfIn PDF document text
    • http://yesnutural.space/their_eyes_were_watching_god_book_club_questions3or2p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388177/normal_6013bd9836d28.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE526 5012 bytes
SHA-256: b6b5f660ce521703a22351d90cf7a0dba4fa8927e825cbe1c6facfa9dbfdf775
font_01_sfnt_off0000f644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF644 11656 bytes
SHA-256: fe119c95c9016b0756ef7d62abe8fc3f5f47eef046be59e0fcb418d0cf04169a
font_02_sfnt_off00011bc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC6 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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