Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec33caf0fcc801dd…

MALICIOUS

PDF

146.3 KB Created: 2021-04-22 13:58:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 5ed30db905736d6980e32d949eb64679 SHA-1: 4f64791504fea3f9efa742d2b5c0ad3e44cd18bd SHA-256: ec33caf0fcc801dd935317121166d4fc66a828e819409946284c15460b4bab04
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The sample was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs, including one pointing to 'fokemale.ru', suggesting it functions as a link farm or phishing lure. The PDF structure and embedded links are consistent with techniques used to redirect users to potentially harmful content.

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://fokemale.ru/strik?utm_term=immanuel+kant+theory+of+morality PDF link annotation
    • http://xabisafeb.22web.org/rgb_color_chart_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wapogade/vUIlyhb/videos_likee_para_descargar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419204/normal_600cde9b95e14.pdfIn PDF document text
    • http://tramlaweq.online/fiwonujaroxagusupiwuqtjsy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484835/normal_5ff0e4a7d9906.pdfIn PDF document text
    • http://lemixop.iblogger.org/kelatopazebujemek.pdfIn PDF document text
    • http://repair-planshetov.ru/relewovuvom9rw8f.pdfIn PDF document text
    • http://risurevisawibe.iblogger.org/donuvobivozagaxivoxuzuwe.pdfIn PDF document text
    • http://habercigo.com/52925785658m1icy.pdfIn PDF document text
    • http://prognoz-football.club/brand_identity_template_onlineb10da.pdfIn PDF document text
    • http://yourcy.com/frigidaire_ffad7033r1_70-pint_dehumidifier_walmartkly4g.pdfIn PDF document text
    • http://the-job.ru/sharp_microwave_parts_usazmfci.pdfIn PDF document text
    • http://cardio-active.site/how_to_redeem_minecraft_windows_10_for_free_2020jb58e.pdfIn PDF document text
    • https://cdn.sqhk.co/tidilotofuka/jeeLMij/episode_guide_grey_s_anatomy_tv._com.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kiwuvapinemugi.rf.gd/full_hd_video_player_apk.pdfIn PDF document text
    • http://xerunur.rf.gd/ib_psychology_ia_word_limit.pdfIn PDF document text
    • http://sasududazo.epizy.com/galvanized_steel_sheet_malaysia.pdfIn PDF document text
    • http://miwofalixi.rf.gd/pakug.pdfIn PDF document text
    • http://xawabaxazulaga.epizy.com/ferrari_carano_siena_tech_sheet.pdfIn PDF document text
    • http://rozabuveragavep.epizy.com/othello_themes_appearance_vs_reality.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002046c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2046C 4932 bytes
SHA-256: 3ee8735bf777f42a9ee624d78a2d5791b035222437489a8927b142eb9e3f46f7
font_01_sfnt_off0002150e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2150E 11200 bytes
SHA-256: c63074e16825fd4c8449d6148eb047c917aabde40e761dceb08a52f4bbe6198d

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