Malicious PDF — malware analysis report

Static analysis result for SHA-256 002e437df8a3667b…

MALICIOUS

PDF

85.4 KB Created: 2021-02-27 10:33:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 326487fe90abd5c698ad39aa67cf1143 SHA-1: dc6d6c9064ab18be0ef88a0b8dc6001e47d406b2 SHA-256: 002e437df8a3667bff6863179e70d0c8efa511aba3261312ced5a0b652beabd6
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 PDF files, suggesting a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links point towards a malicious document, likely used for phishing or distributing further malware.

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
  • 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://leonvi.ru/123?utm_term=merkury+encore+wireless+headphones+review PDF link annotation
    • http://fabermanufacture.ru/37388013636gxvnu.pdfIn PDF document text
    • http://allostar.buzz/kumon_math_books_for_salekqy9c.pdfIn PDF document text
    • https://nuvitofoje.weebly.com/uploads/1/3/4/6/134640236/vesedavutuzoda-juxeteramo.pdfIn PDF document text
    • http://hydrofthol.space/bd_railway_time_tableugz5n.pdfIn PDF document text
    • http://anarchymedya.com/wagisitagonekuboftwbsb.pdfIn PDF document text
    • http://cashtanks.fun/what_does_the_chinese_constitution_say_about_secessionl41wm.pdfIn PDF document text
    • http://zeropium.com/fafofazulibasenqi1mo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/petubapizo/fopobof.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/shankar_nag_video_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/feliso/cool_fonts_for_instagram_bio.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/wuxabemebatavaxulaniv.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_off0001056f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1056F 5288 bytes
SHA-256: 59e3d4ba1b63fc3aa0d6c9b59269f523d9ad4706e44d77e834637a3b56a9a23e
font_01_sfnt_off0001177c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1177C 10284 bytes
SHA-256: 78240d349601904fa450e6ad0436b074a8926b8596302caacc965a50f1ca4f6d
font_02_sfnt_off00013a95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A95 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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