Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a0dc26996ca1f8a…

MALICIOUS

PDF

84.8 KB Created: 2021-03-27 23:16:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ff0dfd48050e804efe8505d2bc28660d SHA-1: 204c9219ef9e8ae7cee55c48734fcb90eb80a17a SHA-256: 2a0dc26996ca1f8ae57d8beea18ec39ac39df3dff81784e24af9b3317b0b0135
226 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

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 and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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://druttle.ru/wix?keyword=free+minecraft+code+for+switch PDF link annotation
    • http://nokilibetajew.mywebcommunity.org/abbyy_transformer_2._0_serial.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367952/normal_5fe3bcdeaf3cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484990/normal_5fec89988be69.pdfIn PDF document text
    • https://cdn.sqhk.co/webuzifinuno/gjUYjgc/tiwinade.pdfIn PDF document text
    • https://cdn.sqhk.co/viliwogid/jjjjaUd/togox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459062/normal_5fddc96834284.pdfIn PDF document text
    • https://cdn.sqhk.co/kototokim/yjhSLge/tepiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385415/normal_603342ac52392.pdfIn PDF document text
    • http://zisuroto.mygamesonline.org/90948802545.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://9b321a86-0615-40a7-b684-6dced782f4cc.filesusr.com/ugd/e3cae3_9b5ecdf2d2214c81b323aeeca65c94f9.pdf?index=trueIn PDF document text
    • https://b73b9701-b1df-43be-b031-73419f87697c.filesusr.com/ugd/bfbd96_752cf78a3e3044f3aaca71040900616d.pdf?index=trueIn PDF document text
    • https://788ae96d-7a4f-4726-91a9-07bb742fb3e7.filesusr.com/ugd/97aff7_56139fb6f21b4780a5b6ef78e8ad1ba3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/abaf435b-2018-4a3c-b5e1-e812dce0c28a/contract_law_cases_australia_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afd90c1e-48f8-4a7e-876b-b76c32c90076/how_many_calories_in_a_panera_bread_asiago_cheese_bagel.pdfIn PDF document text
    • https://e1ca4115-fb55-43f9-84f1-eaf814f8c83f.filesusr.com/ugd/18122d_f3cc5b33a2b8404e8766c1161270745f.pdf?index=trueIn PDF document text
    • https://3b0fe5ff-7f86-489c-8138-fc984e51136c.filesusr.com/ugd/bfd78a_7d8ff450a1a44a1bbe9166c1910542c6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a039d44b-453b-4e64-8a03-36a20801db2a/rurufukejofazekovor.pdfIn PDF document text
    • https://656adf98-7a81-40bd-8d0f-2b9c27d09201.filesusr.com/ugd/268ab1_ae5168e230964e9ebad01974ab9f1af1.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4C 5276 bytes
SHA-256: 8aeed613080ac54b0546c6038513b972fe5280505063122fed4842b5b070c10d
font_01_sfnt_off0000f11e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF11E 6820 bytes
SHA-256: 646f0811d6d2877580c396af571f02a7c5dda566e6919ffb498343c9c6a002d9
font_02_sfnt_off0001086d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1086D 11068 bytes
SHA-256: d1493dede609a0e236be4a8a25d8ff18a52a22d601d0bb14a2d995fc71457196
font_03_sfnt_off00012e45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E45 16272 bytes
SHA-256: 8a9c2a9e05a7f36d0a12abb1053ea0937fa9ec5350b68e86dba19efc34d684c4

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