Malicious PDF — malware analysis report

Static analysis result for SHA-256 b442d6b2a95ae279…

MALICIOUS

PDF

75.6 KB Created: 2021-03-16 22:46:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8ca8a38c01e7c0af8119b8392f740ef SHA-1: dc173ba0ee952e5d08aaa44bb533fca0022b314e SHA-256: b442d6b2a95ae279757633fa0dc7ece2c92a11f1534d578256c399100faaed3f
126 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, identified by heuristics as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were directly extracted, the presence of external URIs suggests an attempt to redirect the user to a malicious site.

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://xezojetit.ru/wix?keyword=separation+of+class+in+hunger+games+social
    • http://jolidulikan.scienceontheweb.net/the_knight_s_tale_summary.pdf
    • http://bobujopolodusol.mygamesonline.org/abdomen_anatomy_atlas.pdf
    • http://siwosupegejolop.medianewsonline.com/firehouse_subs_turkey_cranberry_nutrition.pdf
    • https://cdn-cms.f-static.net/uploads/4495413/normal_604fc2307c312.pdf
    • http://medebupima.sportsontheweb.net/dixemolipobagugokiwumo.pdf
    • http://xugaguf.mypressonline.com/85010203217.pdf
    • http://dikoxikikalonib.scienceontheweb.net/counting_by_7s_book_talk.pdf
    • https://static.s123-cdn-static.com/uploads/4368248/normal_5ffae9b28e95a.pdf
    • http://pinezotamex.getenjoyment.net/annapolis_mall_map.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/baxegezivumi/como_fazer_backup_android_para_iphone.pdf
    • https://uploads.strikinglycdn.com/files/12414a05-be8f-4a80-ad8b-525ff6c3816e/xozakupaduwaderuxi.pdf
    • https://s3.amazonaws.com/zikeko/sig_sauer_p320_x_compact_vs_p365.pdf
    • https://c183b790-cb34-49aa-848e-1a9f2b14dda3.filesusr.com/ugd/d8966e_4bb9f933d5a14f5dbe05af6f81a62e76.pdf?index=true
    • https://d2d87fd5-5f4d-49aa-ab3c-2263ce4b5d22.filesusr.com/ugd/9169d2_5df4c866c27847fea1d4aca60c9e7700.pdf?index=true
    • https://uploads.strikinglycdn.com/files/ab8b08be-4650-4103-a685-3c8181a93b71/pathfinder_iron_gods_review.pdf
    • https://55f5e71c-5f54-469f-9449-301c43944234.filesusr.com/ugd/bbdb65_f6eee44a81ca43d59eeefaa81ffc1a3c.pdf?index=true
    • https://s3.amazonaws.com/xamibebulosaxug/75072597541.pdf
    • https://uploads.strikinglycdn.com/files/36ecf4a4-b467-4514-a793-7230ff80928c/pomexuted.pdf
    • https://s3.amazonaws.com/bokexizometun/geronimo_stilton_books_list.pdf
    • http://wugetad.myartsonline.com/2013_chevy_silverado_owners_manual.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e930.bin
da639480eec4da688451ff19d087469621d7dc7585c8bce2834b3115e40e196b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE930 5532 bytes
font_01_sfnt_off0000fbdc.bin
c4a043efa03244249420ecd7036bebe32cde62b6692e4c2f0e144d9c22f8fb4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDC 10812 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.