Malicious PDF — malware analysis report

Static analysis result for SHA-256 04bdc7611d79fbf7…

MALICIOUS

PDF

116.9 KB Created: 2021-03-22 02:40:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1ce51663d9048f1ac37d16290e28b8e6 SHA-1: 7c0aaf4539558f453a573975834d13ececef7a01 SHA-256: 04bdc7611d79fbf7d966f61a5d78853fd7521f7ca75e729160ae61ab2c86ecf5
144 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document is classified as malicious, primarily due to its use of multiple embedded URLs pointing to known malicious redirectors and disposable hosting. The document body, though heavily obfuscated, appears to be a lure related to a product manual, aiming to trick users into clicking these links. The presence of PDF-specific malicious redirector heuristics and a high ML classifier score further support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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://dafemum.ru/award?keyword=philips+bdm4065uc+manual+pdf In PDF document text
    • http://reweder.site/combine_like_terms_calculator1qx1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471706/normal_6021f7f2bfe54.pdfIn PDF document text
    • https://cdn.sqhk.co/linidivez/bhjWYMG/23031210382.pdfIn PDF document text
    • http://gatofupimekow.mywebcommunity.org/arabic_to_word_converter_app.pdfIn PDF document text
    • https://cdn.sqhk.co/rijujonakuje/Viiu1ha/free_unlimited_virtual_bingo_card_generator.pdfIn PDF document text
    • http://temilops.xyz/49642015032y4hc3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366980/normal_604b6d9a7671d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477637/normal_600d2c5acecd0.pdfIn PDF document text
    • http://lenugaguv.medianewsonline.com/biology_terminology_dictionary.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6d4cd3b7-91e9-43ac-92b9-205473f1e50d.filesusr.com/ugd/28146e_2432315102684f51a612b0585429923d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d791ca87-6be9-4661-b65b-71b3a06ad7e2/razones_trigonometricas_ejercicios_resueltos_vitutor.pdfIn PDF document text
    • https://c2c662fa-00ac-4c69-bf5d-04da7d6c99e2.filesusr.com/ugd/9b33c5_38172bb5f302489d8baba6f452611129.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4b6ba5c-7918-4441-83e6-1444ce3ee69b/bijuper.pdfIn PDF document text
    • https://df6a9abb-74f3-47e1-b359-fe6d1019da36.filesusr.com/ugd/7921d2_525d665fa90245258b01e0ea0ee90571.pdf?index=trueIn 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_off0000e389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE389 52472 bytes
SHA-256: b88ba22e2e9c9c2df840d5e7e4b27eb92341e0fcefa7f502cdc5bb66ead7bd2a
font_01_sfnt_off000181b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x181B9 5948 bytes
SHA-256: f1e21727a8d979f47693aa345af2822aa3d6d5e009f3810c0735194d8157845e
font_02_sfnt_off000195d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x195D7 15908 bytes
SHA-256: 35af5aa77cdc7c8697b8f972f363a19f83960dcaaa10a551152ed690d4d36d57

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