Malicious PDF — malware analysis report

Static analysis result for SHA-256 be5c2a667abff126…

MALICIOUS

PDF

80.1 KB Created: 2021-01-23 15:46:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c869d455ed15761dc3354e400262882c SHA-1: 6d38e6503fb83213aee09c7afe55af8b2a4d15f1 SHA-256: be5c2a667abff1261c09fa91992a6eb30b3954f9bc76113580dc661e2783feec
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to disposable hosting or known malicious redirectors. The primary malicious link identified is 'https://traffine.ru/123?utm_term=fundamentals+of+hvac%252Fr+pdf', which is associated with malicious redirector infrastructure. This suggests the document is designed to lead users to potentially harmful websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/123?utm_term=fundamentals+of+hvac%252Fr+pdf In PDF document text
    • https://zapufotipo.weebly.com/uploads/1/3/2/7/132740892/zexebomipebodag.pdfIn PDF document text
    • https://kigazodiraju.weebly.com/uploads/1/3/4/6/134678535/nurezesoj.pdfIn PDF document text
    • https://cdn.sqhk.co/wemopizajazo/uqheihQ/higher_goals_goal_setter_habit_tracker.pdfIn PDF document text
    • https://wulukapuw.weebly.com/uploads/1/3/0/7/130740123/2098005.pdfIn PDF document text
    • https://cdn.sqhk.co/lawafopugu/hbgfihd/likert_scale_template_1-_5.pdfIn PDF document text
    • https://cdn.sqhk.co/faxidopudome/RRGf3MH/car_traffic_racing_mod_apk_download.pdfIn PDF document text
    • https://sutopudebesi.weebly.com/uploads/1/3/1/4/131438093/4578633.pdfIn PDF document text
    • https://site-1248945.mozfiles.com/files/1248945/statistical_learning_theory.pdfIn PDF document text
    • https://cdn.sqhk.co/nuvurero/fhfywuu/gigafufe.pdfIn PDF document text
    • https://site-1187178.mozfiles.com/files/1187178/sonic_the_hedgehog_2_movie_poster.pdfIn PDF document text
    • https://gumevuwogixuxuj.weebly.com/uploads/1/3/5/3/135317748/2935840.pdfIn PDF document text
    • https://cdn.sqhk.co/midubevine/Fhijgb3/ps4_remote_play_controller_not_working_android.pdfIn PDF document text
    • https://cdn.sqhk.co/bopelara/acjjBhg/50327880114.pdfIn PDF document text
    • https://cdn.sqhk.co/disidudi/hgjKfg4/gundam_wing_heero_yuy_quotes.pdfIn PDF document text
    • https://razivizufizide.weebly.com/uploads/1/3/4/5/134525322/3553134.pdfIn PDF document text
    • https://site-1166675.mozfiles.com/files/1166675/43906768483.pdfIn PDF document text
    • https://site-1180490.mozfiles.com/files/1180490/tatekususazedunewa.pdfIn PDF document text
    • https://rasiguxi.weebly.com/uploads/1/3/5/3/135314707/tilajebe-tasugekijig-tipesuge-fimewumovuwufe.pdfIn PDF document text
    • https://bosowumajozidu.weebly.com/uploads/1/3/0/7/130740465/vewuxibesi-jixetufujiwibes-kirabokelu-redisizejisev.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
    • https://s3.amazonaws.com/bibejovixapis/jesus_bleibet_meine_freude_guitar_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/cina_soul_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/anti_ragging_form_for_pg_students.pdfIn PDF document text
    • https://s3.amazonaws.com/votuweroxigezog/pijudopubunukiburex.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED3E 5280 bytes
SHA-256: 30e664ad7b676e9f2f7872a93f5ce410df907e05af842fd2a5bdecf92fbe7b4e
font_01_sfnt_off0000ff15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF15 11928 bytes
SHA-256: a83d27d539473faf8a331c92787c3994a8ab1def9915e99ed668bd0d7eb0adfb
font_02_sfnt_off00012516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12516 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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