Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2b7550cdbe4beea…

MALICIOUS

PDF

68.9 KB Created: 2021-05-08 13:29:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 3d3915751ca85447cf5880825d3cce01 SHA-1: 884cff12beec6858db1043e9f772c570dd67eb20 SHA-256: e2b7550cdbe4beea815822d7c73e315cd364d987250644294eff746c29fc4cf7
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 0.9997

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://jottigo.ru/strik?utm_term=4r100+speed+sensor+location PDF link annotation
    • https://cdn.sqhk.co/suwapipejob/YifjdmT/skullduggery_toys_out_of_business.pdfIn PDF document text
    • https://cdn.sqhk.co/jujegopenop/5Bm25gL/4695931016.pdfIn PDF document text
    • https://cdn.sqhk.co/petawelesup/mGhiT2r/text_message_notification_sound_not_working_iphone.pdfIn PDF document text
    • https://cdn.sqhk.co/bebumula/idtZihi/21325352230.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424692/normal_602b46774ce9c.pdfIn PDF document text
    • http://ratedewu.scienceontheweb.net/letter_reversal_worksheets.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445869/normal_603ba4fa3289e.pdfIn PDF document text
    • https://cdn.sqhk.co/zisujidixa/xNigihc/wordsmith_tools_free_version.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453129/normal_5fc74f648afa6.pdfIn PDF document text
    • http://ruxuzosok.mywebcommunity.org/83482204959.pdfIn PDF document text
    • https://cdn.sqhk.co/remezebona/Vgeigde/frais_de_retrait_orange_money_senegal_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vazisi/tuvopep.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/modified_barthel_index_scoring_guidelines.pdfIn PDF document text
    • http://nejesezape.myartsonline.com/what_is_the_most_used_drug_in_canada.pdfIn PDF document text
    • http://zutaturusix.myartsonline.com/60669076097.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdadea12-4369-46ff-a8fd-c0ffb1360d52/biblia_textual_4_edicion_e_sword.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/the_advisors_alliance_eng_sub.pdfIn PDF document text
    • http://gufopexolax.myartsonline.com/asterix_als_gladiator_deutsch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0001990-322f-4d62-b019-ca3952a49ce1/83506838425.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de94b872-0415-43b0-88ff-176f2ea469a4/bunibemenoro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7981fd01-50f8-4fb9-9e7c-eed1cab83473/2011_proto_rail_solenoid.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_off0000cf7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF7A 5252 bytes
SHA-256: b2523fd80fc279136c1680f0605f749a36db44eface98a24b05f0a31dbfdf7ed
font_01_sfnt_off0000e168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE168 10380 bytes
SHA-256: 26464db3ae3bcea5bb56a6fd61b8cd9688faf4ab4fe55d175a33a3302bfbd0eb

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