Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b50312d8c240b01…

MALICIOUS

PDF

74.1 KB Created: 2021-03-28 11:28:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 18c80daa61ebe361ed88d40c358e5b37 SHA-1: 002ac852a00f5e27ebfd4e0b599d36599773acb7 SHA-256: 3b50312d8c240b01c38b418768217abb4c7331a7c4da3322c0b941964029d455
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. One prominent URL, 'https://lozipotod.ru/award?keyword=cuales+son+los+valores+morales+y+su+significado+pdf', is directly associated with the document's apparent purpose. ClamAV detection and ML classification strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://lozipotod.ru/award?keyword=cuales+son+los+valores+morales+y+su+significado+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4401525/normal_60272e0d43c72.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498645/normal_603ff267f1f65.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458621/normal_604db7b43fa37.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453560/normal_601233266d052.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489032/normal_5fc8617812725.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474465/normal_60445b1f2e643.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483361/normal_6002142525dd9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/icivics_the_federal_in_federalism_crossword_answers.pdfIn PDF document text
    • https://9eb5ee95-128e-4115-bcd6-d8db8525ce49.filesusr.com/ugd/9904c2_b47fa1ad336448b9b1295b56ea3f93bd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sedimeraxufi/regitirigeposipasifinikup.pdfIn PDF document text
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_51be2ffbc5184ac9bfd0171d7903cd67.pdf?index=trueIn PDF document text
    • https://43cb2d18-1589-43a7-b1c5-fe1278e1c76d.filesusr.com/ugd/370b54_0a6a78e2e60a42b5b3c7932f47baf6f6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/45f7d580-0db6-470e-b754-7e64b612038e/65974435139.pdfIn PDF document text
    • https://s3.amazonaws.com/kefodek/drive_mobility_scooter_instruction_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/1891294839.pdfIn PDF document text
    • https://s3.amazonaws.com/pafexegud/39624965552.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd76030a-8c3f-4aa6-b808-9fe384497d88/63818255204.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e024.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE024 5540 bytes
SHA-256: 7aafef33c12177d63bf6b3ff98fc0e5c049580e8fb8bc9cac8ed6288d875dbeb
font_01_sfnt_off0000f2fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FB 11644 bytes
SHA-256: 73df3a3f8f7726b71de212efd0c41e3aff58dd3926cac135ec490e4a6500996b

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