Malicious PDF — malware analysis report

Static analysis result for SHA-256 72041b518ee097f9…

MALICIOUS

PDF

91.5 KB Created: 2020-11-14 17:01:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: ee2b5b5a9536fb96f7321412ebaa3898 SHA-1: 7421acbb505cc20380a2c1b3a0ea4d01ea1fd2f6 SHA-256: 72041b518ee097f9ecdbb3d2ac34f189836dcd8fe4b045600776ee41c50f5f93
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic identifying a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, suggests a lure related to a screenplay PDF, likely to trick users into clicking the malicious link. The presence of numerous external PDF links further indicates a link farm designed to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 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.
  • 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://cctraff.ru/123?utm_term=malcolm+x+screenplay+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4380078/normal_5f9797c06f0dd.pdfIn PDF document text
    • https://dagigokes.weebly.com/uploads/1/3/0/7/130739756/f05af64111af98b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453902/normal_5fa489e8b94cf.pdfIn PDF document text
    • https://derakudo.weebly.com/uploads/1/3/4/2/134266069/jilojaja_lozid_jumakirune.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366004/normal_5fa1752c86f19.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417025/normal_5f96b66435dae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424364/normal_5f99d25da1216.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/20344ba2-7a02-41fc-a2b9-6ce79adca3b2/draw-tite_activator_ii_wiring_diagra.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9350446c-3a37-4a9d-beaf-1025cd5a71bb/51444900113.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/888d3033-bf61-46a1-8337-43c93cc44fd1/jososixijagatefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4bfc2ae-6dd6-4969-9bde-a170973bb326/19590259569.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/206d3100-917e-4949-b875-8655252a0d28/23156719152.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/kekosovevu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d7770fbf-3ba7-4b3a-93d3-e5ec587e0263/337100288.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_off0001189d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1189D 3980 bytes
SHA-256: 2616be6c3e597efa7b903a0401c286e48a6dead3a7f466cfa829b0a831126e99
font_01_sfnt_off000126cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126CC 5476 bytes
SHA-256: 0b2648c1fa6f4bf9550bb62282f9e44760903dfdadd73b1b11de0dbcebf41228
font_02_sfnt_off00013973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13973 11552 bytes
SHA-256: 66d1050008713c7ee715ff626650067868b26bc2b517de7cf35f77eb7d72a869

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