Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2c0a8a2b6b56699…

MALICIOUS

PDF

136.3 KB Created: 2021-05-04 12:09:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 4d62e3ef972758f1db3c6d102c187766 SHA-1: 57d73d9b154cdd6574b0fa52b4f0a78bee6d0691 SHA-256: c2c0a8a2b6b56699909d842b77e8cd3e21bf707effb009828a82b576c9486b20
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs, many of which are hosted on disposable domains or link farms, indicating a likely attempt to redirect users to malicious content. The document body, though heavily obfuscated, contains references to 'manual download' and specific product names, suggesting a lure for users seeking information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nipisod.ru/strik?utm_term=dell+xps+8500+manual+download PDF link annotation
    • https://cdn.sqhk.co/rorexamuviz/jewigic/walking_dead_season_10_episodes_air_dates.pdfIn PDF document text
    • http://oneplusonemain.xyz/equilateral_triangle_worksheetp3q1e.pdfIn PDF document text
    • https://zorivaleguzovul.weebly.com/uploads/1/3/4/5/134596353/a16fcc1f7f.pdfIn PDF document text
    • https://cdn.sqhk.co/sawijewabob/ihTbigj/cheat_sheet_sample_template.pdfIn PDF document text
    • https://kujivorel.weebly.com/uploads/1/3/0/7/130776875/xuziponerakemof_sexibemet_mufajakow_zapenujowuxuda.pdfIn PDF document text
    • https://wutowenejeboz.weebly.com/uploads/1/3/4/5/134599911/8535456865d66ac.pdfIn PDF document text
    • http://sizegoduxuxa.mygamesonline.org/95761519513.pdfIn PDF document text
    • https://cdn.sqhk.co/turanexode/ibijdhg/fake_kik_camera_app_for_android.pdfIn PDF document text
    • http://13millions.store/context_clues_worksheets_grade_1731vm.pdfIn PDF document text
    • http://mujododaziwato.scienceontheweb.net/wabarused.pdfIn PDF document text
    • http://rozewevojalel.sportsontheweb.net/42494120991.pdfIn PDF document text
    • http://laserisesiseno.getenjoyment.net/capteur_de_proximit_capacitif.pdfIn PDF document text
    • http://zumufufup.sportsontheweb.net/social_media_marketing_a_strategic_approach_2nd_edition_free.pdfIn PDF document text
    • http://toportt.online/86480283172kkiur.pdfIn PDF document text
    • https://pukakiliratof.weebly.com/uploads/1/3/4/7/134768090/rizejefebidufa.pdfIn PDF document text
    • http://nudistoff.club/finefazovazog0sh6o.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/gFrKoSL/8545992214.pdfIn PDF document text
    • http://sitebomobegux.sportsontheweb.net/temario_auxiliar_administrativo_comunidad_de_madrid_gratis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lugivodunoxasi.atwebpages.com/xevonalufapuluvinarowo.pdfIn PDF document text
    • http://romakilax.myartsonline.com/84933207832.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/phonak_brio_2_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/2012_chevy_impala_v6_oil_capacity.pdfIn PDF document text
    • https://s3.amazonaws.com/kagedatabujo/engagement_ring_band_style_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/powerpoint_jigsaw_puzzle_template.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/durga_kavach_lyrics_in_hindi_download.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_off0001d45f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D45F 5628 bytes
SHA-256: afe62512eb0b010c829ff62dfc77797221b3492a721ff941720f2d6f2d3e9335
font_01_sfnt_off0001e79d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E79D 12860 bytes
SHA-256: f7700ab36f88664bd50c8a411597e5dd95212d60efcf3ba77f1d2f84d95841da

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