Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0ead00ffee9c3be…

MALICIOUS

PDF

99.6 KB Created: 2021-04-11 12:41:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 6b8c13654f82981253bc3c9272d49826 SHA-1: 96e1c72cbc87604d8704b530981885c2882d29a1 SHA-256: d0ead00ffee9c3be2e2023b6f49375dc1ff9e97b8c989dc3f4eb71fa41710512
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 6

  • 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.
  • 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://jacksth.ru/strik?utm_term=whirlpool+wmh31017as-3+light+bulb PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4418184/normal_60399f5531af2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373517/normal_602291638d6ef.pdfIn PDF document text
    • https://litukepulaj.weebly.com/uploads/1/3/4/8/134863372/136395.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490739/normal_60222aa03ffff.pdfIn PDF document text
    • http://lnstagram-verifedbadge.com/754742050539aa8m.pdfIn PDF document text
    • http://xizerunax.scienceontheweb.net/aptitude_test_book_in_tamil.pdfIn PDF document text
    • https://fileduwefevara.weebly.com/uploads/1/3/4/3/134384607/xebusoxuzuvop-temotarido.pdfIn PDF document text
    • http://leoidet.xyz/oxford_dictionary_translate_english_to_spanishxtdbu.pdfIn PDF document text
    • http://nageramuvepom.mywebcommunity.org/46759577707.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470040/normal_605d5d410402a.pdfIn PDF document text
    • http://diporesorojina.scienceontheweb.net/92268869170.pdfIn PDF document text
    • http://cmb-societe.com/jarifebevamebaxaje9dau5.pdfIn PDF document text
    • https://juvujifakodokiw.weebly.com/uploads/1/3/4/6/134699996/1767bf906e4.pdfIn PDF document text
    • https://bewimesev.weebly.com/uploads/1/3/4/7/134753962/c0905a02d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498345/normal_5ffcd656b7e87.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rotufixijisadi.onlinewebshop.net/absorcion_de_nutrientes_en_el_intestino_delgado.pdfIn PDF document text
    • https://f200304d-316b-45a9-b05c-680123ec6d1a.filesusr.com/ugd/aad1a2_aa953fd5e9b544d2b2f1c74c38ae09fb.pdf?index=trueIn PDF document text
    • https://0f7a2101-273c-4f7f-b1fd-079d1ad923c1.filesusr.com/ugd/a7ea6f_33fd32f28d8c4f9bbc99c7b27b8c9ad4.pdf?index=trueIn PDF document text
    • https://98350ace-7ac4-4f38-a9d9-579fdad8050b.filesusr.com/ugd/9b2d9b_73477eac75124b8e944dcc36bac05e0b.pdf?index=trueIn PDF document text
    • https://aca292c6-a3ee-4c96-b4c9-db15c8eca1b9.filesusr.com/ugd/cd1d52_3c35771dd2b14933b90bfd82da686bcf.pdf?index=trueIn PDF document text
    • https://ce83042b-5faf-46b5-bcbb-9b4d05ec7d33.filesusr.com/ugd/a31856_ca287871936c4d8a8087c3643aea45aa.pdf?index=trueIn PDF document text
    • https://21036261-01f9-4725-a342-2b8b08d10099.filesusr.com/ugd/d0cbc4_962f52f6b9eb4f119520e631e58f7cfb.pdf?index=trueIn PDF document text
    • https://9d1e48ad-bcd7-4831-9b7b-7108443a63b6.filesusr.com/ugd/136d07_7a498e1e49d14bed8e5c4337f83e799c.pdf?index=trueIn PDF document text
    • http://zeteximezoxa.myartsonline.com/bulefimedipewuj.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012d40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D40 5948 bytes
SHA-256: bbaccab4f25eefa17c267f3cc30eb5983a5094123b12b405e4889deae5658efe
font_01_sfnt_off00014182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14182 12520 bytes
SHA-256: 857d408ba33f126d71aa7ac306c53485f0f6d546452a568fbba8f4be741e2e65
font_02_sfnt_off00016b12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B12 16168 bytes
SHA-256: e5458d7b6d82539349b17fc4713a17e1381d471255c72d9f8116b7c86e08c443