Malicious PDF — malware analysis report

Static analysis result for SHA-256 77969ae7557ca5a6…

MALICIOUS

PDF

77.8 KB Created: 2021-03-16 03:23:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6f5a3cc64ce03192c0b6dfff0001c5ce SHA-1: 289a5656908342275e26c888e2552e2a91efea6a SHA-256: 77969ae7557ca5a6b8b9809cb6c36fe804dd645fa0d0b7066f0278b5810177a5
134 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating it's a link farm on disposable hosting. The embedded URLs and the document's structure suggest a phishing attempt to trick users into downloading a payload disguised as a movie file. The presence of multiple disposable domains and link farm characteristics further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://zajinet.ru/strik?utm_term=twilight+saga+new+moon+full+movie+download+free PDF link annotation
    • http://afracheat1.xyz/votukutuvonaxarubaxulojr3hg5.pdfIn PDF document text
    • http://tamakar.xyz/wynncraft_powder_guidev1dzk.pdfIn PDF document text
    • http://fbdirect.site/mds_3.0_rai_manual_chapter_4mbzdy.pdfIn PDF document text
    • https://kabixiwuvilaz.weebly.com/uploads/1/3/2/6/132681231/6f55744.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417145/normal_6004ff234746a.pdfIn PDF document text
    • https://nagopajasire.weebly.com/uploads/1/3/4/3/134311949/xijapinajeb.pdfIn PDF document text
    • http://zathkatow.xyz/what_is_projectile_protection_in_minecraftug9xz.pdfIn PDF document text
    • http://marketitaly.info/5204207786y23pp.pdfIn PDF document text
    • http://best-store.club/medusawevufawu9mlxk.pdfIn PDF document text
    • https://rejurikin.weebly.com/uploads/1/3/1/0/131070637/lemifajitebawega.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443371/normal_60267c363fea6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367621/normal_5fed1f1514adc.pdfIn PDF document text
    • http://fresh-ita.fun/lic_-_life_insurance_corporation_of_india_mysore_karnataka7m03j.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376354/normal_5fe4347d63ef1.pdfIn PDF document text
    • http://rankingcoach-seo.com/55760831885ghhhc.pdfIn PDF document text
    • https://dorigobumin.weebly.com/uploads/1/3/1/3/131384291/pinuxi_zawugo.pdfIn PDF document text
    • http://urolog.xyz/the_luck_factor_by_richard_wisemanedpxd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502248/normal_5fd0be49c5acb.pdfIn PDF document text
    • http://citruss.space/woxamovok4lox.pdfIn PDF document text
    • https://zememaxuzibur.weebly.com/uploads/1/3/5/3/135326459/bamidipamipefe-bivuvivobatuli-xokawib-tolasinafawuj.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/84a51885-3602-45b0-88dc-33c886238976/lyrics_i_don_care_about_anything_but_your_boyfriend.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/383b956f-83a1-4bfa-b56a-752adce79337/how_to_set_up_xfinity_cable_box_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81d7b8e6-7404-4b6c-a270-d242aa343812/good_soccer_drills_for_5_year_olds.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4e85a77-259a-4d62-a39b-a693ce340172/acido_perclorico_ecuacion_balanceada.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_off0000f2b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B0 5420 bytes
SHA-256: e1f7dae03195944611282d93b03c73bd6295229ba2cf0d37abae4adc2cf4d4c3
font_01_sfnt_off0001050e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1050E 10668 bytes
SHA-256: 5cf769cfd143bac914c99e92b30b431efff328db467c7d096ad3d95dd3760c13