Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1084b5491b48b8e…

MALICIOUS

PDF

77.6 KB Created: 2021-02-27 22:30:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: d9b38158bc1a60415ac685d2a97fd750 SHA-1: 6608d9cbd77d4caff26ae4e99c7469bf8ab94787 SHA-256: e1084b5491b48b8e0e211ec221464d46bb2358a8ff8ab31cf8c5adefbf4ebfec
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs pointing to potentially malicious domains, suggesting a phishing or malware distribution campaign. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this by indicating the PDF is a link farm on disposable hosting.

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://dugedepap.ru/award?keyword=when+you+wait+too+long+to+propose PDF link annotation
    • https://xuwudivalef.weebly.com/uploads/1/3/4/8/134889087/2afbf717cb0af77.pdfIn PDF document text
    • http://1xbet-regi.site/figurines_de_diseo_de_modas_descargar_gratiszfry1.pdfIn PDF document text
    • http://copyrightsupportforlnstagram.com/soccer_skills_training_near_mevu711.pdfIn PDF document text
    • http://speak4pro.com/snip_snap_snorem_card_game_rules3q0ps.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370303/normal_5fdc3c497dbcb.pdfIn PDF document text
    • https://cdn.sqhk.co/mowanideju/fs2bEig/tasty_planet_forever_free_pc.pdfIn PDF document text
    • https://bapuporodotuxo.weebly.com/uploads/1/3/1/3/131381531/lupufojusitixebexoz.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/drlhbjc/baby_care_playpen_extra_panels.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420747/normal_5fcba554990ce.pdfIn PDF document text
    • http://criticcxck.space/vocabulary_words_for_9th_grade_s.a.tz9ctn.pdfIn PDF document text
    • https://lotuvimipel.weebly.com/uploads/1/3/0/7/130739731/815e52db9a5b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416806/normal_5ff116e43c31a.pdfIn PDF document text
    • https://cdn.sqhk.co/zaviresodew/drVjfhe/online_zombie_hack_games.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405202/normal_5ff21a929456c.pdfIn PDF document text
    • http://lnstagramcopyrigtservice.com/buddha_amritwani_marathi_video_songyjib9.pdfIn PDF document text
    • http://wisitens.online/mean_median_mode_calculator_with_solution9kv8q.pdfIn PDF document text
    • http://bostpolamos.site/zasidedofitakizifinab4e1.pdfIn PDF document text
    • https://cdn.sqhk.co/nomazotesi/hfhgjfG/real_car_parking_mod_apk_hack.pdfIn PDF document text
    • http://tamakar.tech/the_legend_of_futianuxiqz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/megulu/wanokafidopedo.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_off0000f397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF397 5288 bytes
SHA-256: 3f4f3c2ad9f78f8a0f2bd5605bd34d9a468282bcfa24305a97482e20d2f25cb3
font_01_sfnt_off000105af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AF 10336 bytes
SHA-256: f72dc94f08cde5814d713886744494b8481bd170a43a5d25a15bf66ccda708b9

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