Malicious PDF — malware analysis report

Static analysis result for SHA-256 8036ad7eb48ddd5a…

MALICIOUS

PDF

90.5 KB Created: 2021-03-24 17:18:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 9aea22a4bbdbf66ad5bba609c9381a7e SHA-1: dd7749009ad4e8d718568b66d9e67e634df4b080 SHA-256: 8036ad7eb48ddd5acc34af1d92a968073c70249b89a70b2b275e75f916f3a2a9
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high heuristic score for being a link farm on disposable hosting. The embedded URL and document body suggest a lure to a website, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent.

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 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://maypoin.ru/aws?utm_term=the+redemption+manual+4.5+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4527859/normal_604f065336211.pdfIn PDF document text
    • http://pukebebizadolu.mypressonline.com/arduino_mega_2560_pro_datasheet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408862/normal_6000d7069ff10.pdfIn PDF document text
    • http://dududuw.mypressonline.com/riwupajuguro.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/78e046f7-57c7-4853-a3a7-4e0e3609c018/98718933078.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52917dfb-b690-4702-ba41-26ed2d9a55c1/a_lesson_before_dying_chapter_10_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a48cc6f4-ea52-4dae-8faf-773113f9fe5d/31259109612.pdfIn PDF document text
    • http://migaxutajudoxu.epizy.com/levexadamilipufusebe.pdfIn PDF document text
    • https://f0198b83-f3fe-41b4-8315-bacd7eabb238.filesusr.com/ugd/2b3f46_5e1c28475301422bb93b3c3ff5d850d8.pdf?index=trueIn PDF document text
    • http://gegenig.epizy.com/39097777481.pdfIn PDF document text
    • http://rokivurudaga.epizy.com/is_volkswagen_owned_by_porsche.pdfIn PDF document text
    • https://47e244ab-6b1f-4ae7-97e8-86de5b619f9f.filesusr.com/ugd/e1d12c_b0b718edc192455faab4e8d701af0045.pdf?index=trueIn PDF document text
    • https://2c8134a4-d865-4da1-8961-c755d7242105.filesusr.com/ugd/6dcf04_5435984a164c413b82022add9076ccc5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zesotat/24231220778.pdfIn PDF document text
    • http://likutolejit.onlinewebshop.net/history_of_biosecurity.pdfIn PDF document text
    • https://69cf8a46-0d3d-4b71-8fd1-93df925da18e.filesusr.com/ugd/e4064d_02a57d3376f246b09e9c6e40ea094e26.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mavixu/85741536867.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42198da4-3ee8-447e-a223-452949ead6e5/5532917537.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_off00012302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12302 5296 bytes
SHA-256: 4dbf430f1423b3d030c00b96c2c2d5e9ee1fc921bb1806875c2ab0a1e3b34a26
font_01_sfnt_off000134e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134E6 11912 bytes
SHA-256: 1a96e713f89c9ca4c91a72221ea5882d4c3a5438f8d377ea9042d47f09353005

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