Malicious PDF — malware analysis report

Static analysis result for SHA-256 445b8c2b2fe00fc9…

MALICIOUS

PDF

65.1 KB Created: 2020-12-01 17:53:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-12
MD5: be4ebd8d20461d8b9376c06b8cde2cc7 SHA-1: c78e85785336235417c06efa2d3b448dd59472f5 SHA-256: 445b8c2b2fe00fc98d58467f60578e56f56c5a9e3219bfbe950b55dc1a7950cc
176 Risk Score

Malware Insights

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

The PDF file was flagged by multiple high-confidence heuristics, including ML classification and ClamAV detection, indicating malicious intent. It impersonates Facebook and uses a lure related to 'decomposition reactions worksheet' to trick users into clicking a malicious URL. Although no scripts were extracted, the PDF structure and heuristics strongly suggest a phishing attack designed to harvest credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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://trafffi.ru/123?utm_term=decomposition+reactions+worksheet.
  • 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://trafffi.ru/123?utm_term=decomposition+reactions+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366637/normal_5f8785fea23a2.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/rimejiguvif/cash_leasing_cows.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96570591-e5bc-442c-8360-ccf281061644/dojodifaxikeda.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10f47bd14ff0dd29d9327/t/5fc60000cb3e0f57711e09ed/1606811652564/draculaura_doll_walmart.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/pengertian_agama_islam.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc07dde27a199023ab34438/t/5fc156204f98375720116374/1606506017444/black_witch_dress_plus_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b06520e7-5760-462d-bc05-ceec71f14f83/les_types_de_viandes.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc016b9c30a162e0c4e17a3/t/5fc156d53c02f22b9d3eee18/1606506197484/lift_with_laura_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/912d30df-f242-4811-8aa2-275143f8081f/nonajuzubaduge.pdfIn PDF document text
    • https://s3.amazonaws.com/bupijila/atomic_mass_number_of_all_elements.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_off0000b5ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5ED 5084 bytes
SHA-256: 01ed3c2f7290c71c11317ffdd4d12b290ee191f61345d5b83c3f558f510a2855
font_01_sfnt_off0000c70f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC70F 10188 bytes
SHA-256: 47b63d2cedc4949f0b05828b9c1836a5233d0b36e6619d5fd83cb79c72e93770
font_02_sfnt_off0000e9d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D8 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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