Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d5643d01b624a63…

MALICIOUS

PDF

75.7 KB Created: 2021-04-19 22:07:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 613f12d1ca6d23d70d3483c69549ebcb SHA-1: 767bf252bbde5930cbf7182250a12e63384e532a SHA-256: 0d5643d01b624a633ca569646fe6bd8b8c5f0a63a7614f8edf7369ec9acdb06f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://mezovuduw.ru/strik?utm_term=danby+dehumidifier+pump+drain PDF link annotation
    • http://tozofuji.scienceontheweb.net/malayalam_general_bible_quiz.pdfIn PDF document text
    • http://itactical.xyz/formulas_de_vectores_fisicazakmq.pdfIn PDF document text
    • http://sonasutos.mywebcommunity.org/calendario_laboral_2020_castilla_y_leon.pdfIn PDF document text
    • http://copyright-supporthelp.com/angry_birds_rio_free_play_store4dmjd.pdfIn PDF document text
    • http://libralab.digital/msi_h81m-p33_manual_downloade0z64.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://domebiwek.myartsonline.com/microwave_diathermy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a277fc2c-537b-4dbd-bc5d-422813baf647/36168516494.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/tunet.pdfIn PDF document text
    • https://9ebe8999-295a-4f11-87dc-c96f3e1b46ff.filesusr.com/ugd/8de238_970c0fe5111943b28ca73378daa077c2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/81187baf-ae1b-4967-838b-d2eca7d809d8/15178234652.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/roy_baumeister_willpower.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/812013c5-2c12-4e0c-908a-9cd73c89bb15/tinopivo.pdfIn PDF document text
    • https://26b54b0d-7067-4615-bd5a-e9f638bc9197.filesusr.com/ugd/26f5b5_23d96f23d2b44d04a67e73e999512187.pdf?index=trueIn PDF document text
    • https://5efcf519-4c71-4be9-a00f-e1d47ba804c5.filesusr.com/ugd/ebcc4b_394a8017b1a54e77b77c263b51c50724.pdf?index=trueIn PDF document text
    • http://xomapagovujux.atwebpages.com/fekorajinapirezisose.pdfIn PDF document text
    • https://3d7c42e8-cad9-4196-8f3c-0f210fd97588.filesusr.com/ugd/1b7c00_4f824325c1784df2b58fc27d7ec9494b.pdf?index=trueIn PDF document text
    • https://c5c1e25b-3ca9-4f8f-aecb-0ee3b29cb37b.filesusr.com/ugd/f4fe7b_a2a0b7429ae34513bc6ee7f33284e834.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3649978-be21-4412-a12d-c42d7d32acff/19060264594.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_off0000ea2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2A 5312 bytes
SHA-256: 7f66959c177db0ce009c3d1f13e2713c0492d6a27658973019f66a4f67d26739
font_01_sfnt_off0000fc13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC13 11128 bytes
SHA-256: b042be2a8bb411c64c6c3e0720eded34b3bd3eef071ae14ec29a59eeb54d3762

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