Malicious PDF — malware analysis report

Static analysis result for SHA-256 340893a1e8987d33…

MALICIOUS

PDF

75.5 KB Created: 2021-03-18 11:03:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 10b2d00fff29b77f5172f256196c92bc SHA-1: 60d04f879a728257f0758f2ed484975dac2d8342 SHA-256: 340893a1e8987d332d5f2cdbe1c76c40da8e2b1d6fe0bc50b92eb9d3d5b5def8
126 Risk Score

Malware Insights

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

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with one specifically noted as an external URI pointing to a suspicious domain, likely for phishing or malware distribution. The document body, though partially corrupted, contains a phrase that may serve as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://seumenha.ru/wix?keyword=now+i+am+flying+to+the+moon+and+back PDF link annotation
    • http://dashcamtopbest.com/difference_between_inner_product_and_bilinear_formvrota.pdfIn PDF document text
    • https://cdn.sqhk.co/lekusovu/cjeiheF/46711301187.pdfIn PDF document text
    • http://lorubuxetorifa.medianewsonline.com/remember_the_titans_movie_questions.pdfIn PDF document text
    • http://allrecipes.pro/ligalavorolaxiwulekabaridwazr7.pdfIn PDF document text
    • http://fejukoturig.medianewsonline.com/love_yourself_trumpet_solo_sheet_music.pdfIn PDF document text
    • https://cdn.sqhk.co/mokabawimav/0igoNij/76050917988.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470836/normal_603f351f8168a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490273/normal_6002912a3d1e5.pdfIn PDF document text
    • https://cdn.sqhk.co/rubekafux/jejgibG/26717120319.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497646/normal_602d6f6e10d31.pdfIn PDF document text
    • http://picsonair.com/850706728061wlsz.pdfIn PDF document text
    • http://tesugujinarijag.mywebcommunity.org/o_que_comer_para_no_engordar_na_menopausa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417140/normal_600f5872a65dd.pdfIn PDF document text
    • https://cdn.sqhk.co/rawatajizefu/MKtgfgi/43306372049.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464739/normal_5fd6492feb7f6.pdfIn PDF document text
    • http://raxewapikeb.mygamesonline.org/jefopixijebabedupuj.pdfIn PDF document text
    • http://soldonlakewood.com/bunex2ijln.pdfIn PDF document text
    • http://afracheat1.xyz/modonutu11jlk.pdfIn PDF document text
    • http://khareedforosh.com/math_textbook_for_4th_gradee9czh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuvarijes.atwebpages.com/61004789344.pdfIn PDF document text
    • http://mepitar.atwebpages.com/jimutikulugexem.pdfIn PDF document text
    • http://nejarisiwudu.atwebpages.com/86457894397.pdfIn PDF document text
    • http://lawesiwewif.onlinewebshop.net/tizut.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_off0000e6ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CA 5528 bytes
SHA-256: f972a92640127bc0b1f80ca1ba47a7461ebfb1bbd7b2059bdfc584db29ef05a0
font_01_sfnt_off0000f99a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99A 11992 bytes
SHA-256: 356bba4aacd7ff0ed029bd0b7a8e6a919fec233e963e1da2d7911a48d274f4ec

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