Malicious PDF — malware analysis report

Static analysis result for SHA-256 d004041966d23352…

MALICIOUS

PDF

73.2 KB Created: 2021-03-04 20:58:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 606ccb27c9aec13b1cd3ff4363c014f5 SHA-1: 0606d0cd88acc964282a45edfe55a0a23ad9d5ef SHA-256: d004041966d23352ef315d0466d7ea2afc78a076927da16dc62f2e074811bd40
236 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://mezovuduw.ru/wix?keyword=cset+math+subtest+3+study+guide+pdf.
  • 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://mezovuduw.ru/wix?keyword=cset+math+subtest+3+study+guide+pdf PDF link annotation
    • https://cdn.sqhk.co/dikabopagesi/d7R0gce/creative_destruction_pro_gameplay.pdfIn PDF document text
    • https://cdn.sqhk.co/dijogiper/jeacYif/nipuvomupu.pdfIn PDF document text
    • https://cdn.sqhk.co/nesadatifu/j4z81mo/43548066449.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499636/normal_5ff016c80b34f.pdfIn PDF document text
    • https://cdn.sqhk.co/poronujefino/giUMFT2/frog_tape_pulling_paint_off_wall.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378855/normal_6034dff4eb807.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/sinamozagemoger/transformers_alternity_bumblebee.pdfIn PDF document text
    • https://59cf682b-6680-4a08-8b8d-0472bab64ef7.filesusr.com/ugd/d7d6cd_c11df56752b745019821fe94aca1341a.pdf?index=trueIn PDF document text
    • https://5ce19dfa-329f-495d-88d1-e1e7834d9072.filesusr.com/ugd/d902bb_b8aeb24f1595465b816eda111edf7b15.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jebokizez/cadastro_nacional_de_informaes_sociais_nis.pdfIn PDF document text
    • http://dufemeg.epizy.com/55510650489.pdfIn PDF document text
    • http://jiviruzojid.epizy.com/cerebral_palsy_meaning_in_bengali.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/materials_chemistry_and_physics_guide_for_authors.pdfIn PDF document text
    • https://s3.amazonaws.com/tanapilamaxi/gopufu.pdfIn PDF document text
    • http://zawopomosegasax.rf.gd/70219018170.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD247 5424 bytes
SHA-256: 08de67c1475ab81c5c6dfc4f8aead3693594a24d6eea837b37b066a2fa2bb811
font_01_sfnt_off0000e4c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C3 10692 bytes
SHA-256: f3389d77ed4e9a862188ea9f16490bf64dcea6e199a984d1f192f528d21db210
font_02_sfnt_off0001096c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1096C 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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