Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d473edaae0a8d6d…

MALICIOUS

PDF

88.8 KB Created: 2021-03-23 12:30:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 0f7c04a67aac083ece550f1f5933fd65 SHA-1: cd63d5eebcc9768fe907d411bf75bb10c76a29a7 SHA-256: 3d473edaae0a8d6d481e9b1c6266fb8e810ec05b1c09b06d603db77b6e825f83
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation scheme. The presence of embedded URLs and the PDF's structure point towards an attempt to redirect users to potentially malicious or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://mezovuduw.ru/123?utm_term=blouse+ka+design+photo PDF link annotation
    • http://mydenverneighborhoods.com/relative_clause_with_omitted_pronoun_ks2wk9h7.pdfIn PDF document text
    • http://lebedugipul.mywebcommunity.org/80114061176.pdfIn PDF document text
    • https://kemumapuvepuvi.weebly.com/uploads/1/3/4/3/134311950/pifilapiv_danesu_detexanelejazu_puwalozeromix.pdfIn PDF document text
    • http://moxipafuxoxo.mygamesonline.org/vedinomozuruxeluwekajipo.pdfIn PDF document text
    • http://lojasamericanasbr.com/defuwumotamq172t.pdfIn PDF document text
    • http://zokugorevat.mywebcommunity.org/arabsat_channels_frequency_list_2020.pdfIn PDF document text
    • https://sagagedonu.weebly.com/uploads/1/3/4/0/134017332/d5997211350327d.pdfIn PDF document text
    • https://jokilexagazoxo.weebly.com/uploads/1/3/4/6/134602179/viwoz-wobixexo.pdfIn PDF document text
    • http://xegisepereti.mygamesonline.org/nuance_editing_text.pdfIn PDF document text
    • https://witirasa.weebly.com/uploads/1/3/4/5/134525236/c01c2ed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luvabokinoleg.onlinewebshop.net/the_road_less_traveled_ebook.pdfIn PDF document text
    • https://s3.amazonaws.com/robumuduluwise/74711692362.pdfIn PDF document text
    • https://dedb376b-efc3-4528-ac10-fc65d12f866c.filesusr.com/ugd/5f6074_8e2c4607c9ba4bc68f42fe2d93c48b7b.pdf?index=trueIn PDF document text
    • https://0f0532cb-4478-41f9-91a1-cf277c4732ec.filesusr.com/ugd/8acad3_7eb03c37e98343ceaed2ca3512a28950.pdf?index=trueIn PDF document text
    • http://mujebik.atwebpages.com/padawezasafeme.pdfIn PDF document text
    • https://f459ab6e-ac57-43ce-b83a-1524846427e4.filesusr.com/ugd/938c70_733be91e9eee48e58dfc662fbfddd049.pdf?index=trueIn PDF document text
    • https://b564fea6-732e-489f-a029-a72dc6590de2.filesusr.com/ugd/6a4619_bb74711ce9204e018eac7ef82ee8ab7b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/firudegix/autodesk_inventor_student_free.pdfIn PDF document text
    • https://f9c380c0-3c9a-404e-8c76-a924832b335c.filesusr.com/ugd/9c8fb9_2fe5a484255046969a5fe51742b8011d.pdf?index=trueIn 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_off00012011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12011 5240 bytes
SHA-256: b1b41f2675cf5d2e6c055222fab547325b84028aae8833525338a5c1c08b156f
font_01_sfnt_off000131e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131E9 10620 bytes
SHA-256: 1f41506c52fe0f48656c440de7bcd704f438835af4cc00efe46c14b8cc9d8c65

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