Malicious PDF — malware analysis report

Static analysis result for SHA-256 1901d5f002d38a04…

MALICIOUS

PDF

77.2 KB Created: 2021-01-28 11:08:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b4a4eb29e1bf2a30f95abbff20a751d2 SHA-1: d708f3bddafb1f55d913ab434bd7a0127077b85c SHA-256: 1901d5f002d38a0408d9d1e36e97a0733455c1798bd0189014f81a9c974e32c9
136 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically indicating a phishing or trojan threat. The high-risk heuristic 'PDF_SEO_UTM_REDIRECTOR_LINK' points to an image lure designed to redirect users to a malicious URL, likely for phishing or to download a second-stage payload. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the presence of embedded URLs and the nature of the heuristics suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jottigo.ru/123?utm_term=upper+ball+joint+failure PDF link annotation
    • https://cdn.sqhk.co/seponidozit/3Hwidhb/digital_marketing_course_online_free_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/pigajifaw/hchjCyE/40046456290.pdfIn PDF document text
    • https://cdn.sqhk.co/waxigapo/hpcy9ia/green_skin_dungeon_master_soul_stone.pdfIn PDF document text
    • https://cdn.sqhk.co/vasegodesazu/3hiG8hg/54784432310.pdfIn PDF document text
    • https://cdn.sqhk.co/bidelefo/9iahibE/old_man_s_journey_ps4_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/je5IgKH/roganuxogivukexanadom.pdfIn PDF document text
    • https://cdn.sqhk.co/goluxewimabu/d7hjghr/slice_of_life_anime_romance_comedy.pdfIn PDF document text
    • https://cdn.sqhk.co/vozevadijut/VhhzJhc/49526756683.pdfIn PDF document text
    • https://cdn.sqhk.co/towinomer/chdgfhg/wosobesuvedavutaxo.pdfIn PDF document text
    • https://cdn.sqhk.co/ditutafewaw/FhiifIo/28104155796.pdfIn PDF document text
    • https://cdn.sqhk.co/pupevadojas/j2diiUQ/marvel_heroes_vs_villains_pinball_machine.pdfIn PDF document text
    • https://cdn.sqhk.co/nusuguponu/iegjvhj/rebebegudonop.pdfIn PDF document text
    • https://cdn.sqhk.co/zipirevofu/KKghNih/77270265701.pdfIn PDF document text
    • https://cdn.sqhk.co/zujubiviv/Tjdhe05/jump_spiral_slide.pdfIn PDF document text
    • https://cdn.sqhk.co/buzusodova/Vdv6bQx/84976332545.pdfIn PDF document text
    • https://cdn.sqhk.co/gonolesuzam/RKgi2g8/bugs_bunny_cartoons_characters.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/jepinebawo/sazowor.pdfIn PDF document text
    • https://s3.amazonaws.com/lekelepowo/matematica_elementar_analise_combinatoria.pdfIn PDF document text
    • https://s3.amazonaws.com/luropiw/canford_school_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/davawina/newoga.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e1e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E8 4808 bytes
SHA-256: 1cea5adf12a11ea270833e298ac0d04806bbc9e4a1b34931fe29c3b0cd6b8efc
font_01_sfnt_off0000f24c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF24C 11396 bytes
SHA-256: a369e4d7b0078618c95eeeca0bfd489b762834d398becafdb9ae5956c7258ffc
font_02_sfnt_off000118d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D8 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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