Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6a609992f9b4689…

MALICIOUS

PDF

80.7 KB Created: 2021-03-10 21:37:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5d88a62d25f3b413642b3d8891e94cc3 SHA-1: 983e0fb752c30ef4dbe5b9b404ae5af514203549 SHA-256: e6a609992f9b468961bc31382ff769dd7ae6c1b4aa7cc8b57bc7ae0f7f6b84c4
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://leonvi.ru/strik?utm_term=hindi+song+lyrics+starting+with+alphabet+gospel PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4376858/normal_5fe16897698bf.pdfIn PDF document text
    • https://vaxawoma.weebly.com/uploads/1/3/4/7/134745114/c033297a5974.pdfIn PDF document text
    • https://tonituligavu.weebly.com/uploads/1/3/4/8/134884188/9258997.pdfIn PDF document text
    • https://cdn.sqhk.co/gogojiranat/81vOk3w/earn_to_die_3_unblocked_games_weebly.pdfIn PDF document text
    • https://kitomejefu.weebly.com/uploads/1/3/4/1/134108571/foguxu.pdfIn PDF document text
    • https://rajevolid.weebly.com/uploads/1/3/0/8/130813967/1682527.pdfIn PDF document text
    • https://cdn.sqhk.co/nananava/qggjdje/movie_creator_mac_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407986/normal_603da82723a5e.pdfIn PDF document text
    • https://cdn.sqhk.co/dilizilozok/egehi1h/domigopefugazile.pdfIn PDF document text
    • https://cdn.sqhk.co/zunowexafa/j4Lgehd/rapomavizuruzetizixu.pdfIn PDF document text
    • https://cdn.sqhk.co/kawonidoza/KIjbsif/tiny_tomb_dungeon_explorer_items.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0a01f052-6ee6-4bfa-868d-d2e49373b03f.filesusr.com/ugd/55f640_0c26e8622ae445ce96a7507adbe840cb.pdf?index=trueIn PDF document text
    • https://878ee1be-828d-48b9-a24a-84283cf66a1c.filesusr.com/ugd/86936c_db8c10bcdc8b47e4940d751593f1aad6.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5aafb69e-3d89-4f63-8f26-c0a4b908eade/what_is_simple_interest_in_terms_of_economics.pdfIn PDF document text
    • https://01c19f78-c7d0-441a-b56a-8672493f87de.filesusr.com/ugd/9d66c7_9708264f315d43ca975e1355100e7972.pdf?index=trueIn PDF document text
    • https://920f4c01-5fd6-4c40-8b27-b99972fecb60.filesusr.com/ugd/d63aaf_91475e10580b46948551271b518b68e3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wetevali/59421225148.pdfIn PDF document text
    • https://s3.amazonaws.com/vavapekadoliti/fuvusokafaboxab.pdfIn PDF document text
    • https://0e9c393c-9feb-4465-ae9d-4486bea7a644.filesusr.com/ugd/4b68be_d7e365538f77429fab62e25182d16072.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/5943fd25-1211-4951-bdc8-f4b486a094c0/90243685592.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e01540a-3841-4143-8176-77eb60a4c9b0/best_way_pizza_somerset_menu.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_off0000fc9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC9F 5632 bytes
SHA-256: d16e17698956a66d32832206d60bb9dfb9f169bbf978129ac2caf909da9204ea
font_01_sfnt_off00010fd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FD2 10988 bytes
SHA-256: dff57f22d52b1cec1e7fd592fc7ee7310795f2c21fea838a2c376ab943cd385d

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