Malicious PDF — malware analysis report

Static analysis result for SHA-256 758868a9e020a0e7…

MALICIOUS

PDF

74.2 KB Created: 2021-03-21 08:14:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 396bbf6593387ba333522914146df203 SHA-1: 9f0c0caf5bed2bc1bb740423530210cbe5185b72 SHA-256: 758868a9e020a0e759891c0a50a37a512e514b0df4f2f530017e05549f7c4746
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting it is part of an SEO spam or phishing campaign. The document body, though heavily obfuscated, references 'Michael Jackson 30th anniversary celebration full dvd', a common lure for such campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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://leonvi.ru/wix?keyword=michael+jackson+30th+anniversary+celebration+full+dvd PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420927/normal_605518784a2e9.pdfIn PDF document text
    • https://vadezewojig.weebly.com/uploads/1/3/1/3/131379553/fikopoji-ripebelevufema.pdfIn PDF document text
    • https://livaganomin.weebly.com/uploads/1/3/4/3/134399079/8e8db91c802e6.pdfIn PDF document text
    • https://cdn.sqhk.co/bokirebi/IjcOhhd/jegafes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414678/normal_5fd86635f0b32.pdfIn PDF document text
    • https://cdn.sqhk.co/tomubozes/uje7wmj/walosigipom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373509/normal_5fd3511c1c5b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494433/normal_5fed0d8d2eeed.pdfIn PDF document text
    • https://xoruvuxana.weebly.com/uploads/1/3/2/6/132696063/ranatopokipi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448550/normal_5fd04dc00b863.pdfIn PDF document text
    • https://dabusoze.weebly.com/uploads/1/3/4/5/134585091/e8767e3816c7611.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455883/normal_6049534b4011b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416139/normal_601b1d531bb4c.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/34782ca0-398e-4fdd-9793-46762c81119c/mekotebugojulus.pdfIn PDF document text
    • http://pajusokato.epizy.com/95556079932.pdfIn PDF document text
    • http://nuwasalapo.epizy.com/used_commercial_speed_queen_washing_machine_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd96659b-e783-47eb-89d8-8b3fdd3175d1/51090617458.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_off0000e0af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AF 5860 bytes
SHA-256: 952a54520b7bc2a9b4b74944759a9fd4081b9efecbeee5b3817fdad8b642786d
font_01_sfnt_off0000f4b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B4 11456 bytes
SHA-256: a6aa8353f1006ab39d9a20fbe5d1be6d10bb3ef1e58d5f26afaf69d0f1ff9ee4

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