Malicious PDF — malware analysis report

Static analysis result for SHA-256 be5057537a34463f…

MALICIOUS

PDF

87.1 KB Created: 2021-03-08 17:40:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: fec9883e3af98c58d64b5bc2d126e76f SHA-1: a63e4105cd9af5a69f4e8b6f92ff6a75b0374b1d SHA-256: be5057537a34463f8822b2df190b15dcf079277464aaacc42c2129a3a560dee7
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to potentially malicious or SEO-farmed content, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs point towards a malicious document designed to redirect users to harmful websites.

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://botokaw.ru/award?keyword=pmbok+agile+practice+guide+pdf PDF link annotation
    • https://cdn.sqhk.co/xefilelo/Kjhk6jd/xesakesabepipebefopiwozu.pdfIn PDF document text
    • https://cdn.sqhk.co/sujutowupolu/7fijtp0/56694704368.pdfIn PDF document text
    • https://cdn.sqhk.co/zarejesorufo/iWWgiij/405430315.pdfIn PDF document text
    • https://cdn.sqhk.co/lemijexo/fHHeNqS/minecraft_world_map_download_survival.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/66a5a28c-0563-4f14-85d3-ab1d6df3933e/vatizumuriruve.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/jepasasazat.pdfIn PDF document text
    • https://af18ad75-7652-4b25-b9e0-8da5fded0af1.filesusr.com/ugd/529385_6ab486e5adb44a0f8b6a23ff682cca94.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pilazi/26879652909.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/182292d0-2dc6-4ff5-aab0-accfc684f697/the_displaced_person_flannery_oconnor.pdfIn PDF document text
    • https://99516632-72ce-40f3-a9a1-a01c91361c65.filesusr.com/ugd/e42c35_a09489eab72c4e8197534686dcbbe523.pdf?index=trueIn PDF document text
    • https://411be8f8-4ba1-40b5-9edf-cc4a2c3d5ecc.filesusr.com/ugd/a86d68_b264035a6d22433a9d2c36468aab5451.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/how_to_listen_to_the_highest_quality_music.pdfIn PDF document text
    • https://850a36a1-966c-46c3-86ed-e15bcb5778a7.filesusr.com/ugd/ede58b_82cc2984376c4f06bf720e2dfb580a12.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pulavokaxe/31154141784.pdfIn PDF document text
    • https://c0cead0d-5248-483d-940e-95cc3acd9bde.filesusr.com/ugd/20d83a_e6ac2d600e8c4229a8993260bff6991c.pdf?index=trueIn PDF document text
    • https://920f4c01-5fd6-4c40-8b27-b99972fecb60.filesusr.com/ugd/d63aaf_ab6ccdd2f3d44583afd04b72d0e7d250.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zuses/sigirokele.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56c55001-2af4-4444-975f-db531cae381b/seramutaboverekabipajikes.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/83471736451.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_off00011a3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A3A 5500 bytes
SHA-256: afab068d6f2c8c99e74371624cac35713f56f67583c9d75fc1013430a0639c44
font_01_sfnt_off00012cdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CDB 10088 bytes
SHA-256: e2bddf387443b512d668418ece4a61d6cb8adf28f46bb020fcbd2fc6d31687f8

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