Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d2a37dbcc63ac24…

MALICIOUS

PDF

78.0 KB Created: 2021-03-19 21:50:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d16a7ee8dc2852d8d238e1a01f561e02 SHA-1: b376c2191ad2f1d9d99a92d431857ac9e30df617 SHA-256: 0d2a37dbcc63ac24a5c9482e83b33f82783f08b2ec061e083c2ccfa4ed0c0dc3
186 Risk Score

Malware Insights

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

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 0.9996

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://dafemum.ru/wix?keyword=magna+bikes+website PDF link annotation
    • http://ewwe.space/homemade_wood_gifts_for_christmastd7su.pdfIn PDF document text
    • http://wonder-ita.fun/tedunedosozusexinofuzes5oie9.pdfIn PDF document text
    • http://beach-fruit.fun/wutozirirituzozijzjiz6.pdfIn PDF document text
    • http://bioforce-co.site/roxikotipakogojitanpqou.pdfIn PDF document text
    • http://allwoman.site/31851365903blbh3.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/ac6389f9-7437-409a-86a4-7a536345601c/13325183262.pdfIn PDF document text
    • https://a62e46b8-d933-4087-892c-e5439cec6991.filesusr.com/ugd/e9cba9_6daca7deb7c44b87b36e4d9115a2bdd4.pdf?index=trueIn PDF document text
    • https://f1ddcea9-c323-452c-a4d3-aaefec61e50a.filesusr.com/ugd/defd8a_090b15e629c04edf80cb47d7b23be65e.pdf?index=trueIn PDF document text
    • https://ac3db616-04cb-40f1-8357-c67041f5e20c.filesusr.com/ugd/eda9ba_2e4e306ec1bf4a75962c41e957f09400.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/farifawusukaxiloxapeloli.pdfIn PDF document text
    • https://1c985592-4fe2-425a-b8d2-7dc24782370c.filesusr.com/ugd/a13bc2_08f95f2344294e928eb7225108b0a25d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ce6ccdb-ea49-4acc-afa9-47aaef4b231d/45176259582.pdfIn PDF document text
    • https://s3.amazonaws.com/gapivegek/kogigelosolatalogim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8bf18e17-132d-46ad-a4db-ab34090e19c9/foguj.pdfIn PDF document text
    • https://s3.amazonaws.com/baxadelefofibuz/wepasekijizifufegebof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cd5a4c6-757e-40bc-a2a3-8181442be90a/what_verse_says_all_things_are_possible_with_god.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09f8008b-4b2d-4a98-b649-ca513ad35e0e/us_history_chapter_19_section_4_the_other_america.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/artisanal_and_small_scale_mining.pdfIn PDF document text
    • https://fccd5518-64e1-462d-9dbe-8d8d8a19ca7a.filesusr.com/ugd/eb005d_1bd93bdcb0f04068bf495d95aadd4fcb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/516cf18f-17db-46e2-9d81-d51eac664cf7/vampire_diaries_season_8_cast_siren_sister.pdfIn PDF document text
    • https://s3.amazonaws.com/fonazuzixagizir/82791289193.pdfIn PDF document text
    • https://041f977c-1598-48cb-b578-3d63f550c8ab.filesusr.com/ugd/524ae3_388a85e7be344db2bf941cccf0e46257.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_off0000f4ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AC 5028 bytes
SHA-256: cc9c211e87322cbd92163616b47f5b1739dc52f35887b5da7b94cc96be4bcb0e
font_01_sfnt_off000105ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105FF 10896 bytes
SHA-256: 8a60feba2285eedb9e6e05d52e8231749346f1128dd547d03894d0e32ab6fca6