Malicious PDF — malware analysis report

Static analysis result for SHA-256 af201322f97aa697…

MALICIOUS

PDF

93.3 KB Created: 2021-02-15 23:05:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 52888d253600ae3bbe0942411c0cf45c SHA-1: b73545a0225618b81a74e304c3540fab9e864b75 SHA-256: af201322f97aa697ec3169c328cb7f3c7961ceac62c8186fc9a6bade2ced6c8b
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or redirection scheme. ClamAV detected this as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of external URIs and a link farm suggests an attempt to manipulate search engine results or redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wix?keyword=elisa+di+rivombrosa+season+2 PDF link annotation
    • http://roskycnmx.com/71116226228bqzfr.pdfIn PDF document text
    • https://cdn.sqhk.co/kagurase/jdGafgh/my_piano_app_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/ripigopes/PyjdL15/download_game_bomb_squad_mod_android_1.pdfIn PDF document text
    • https://cdn.sqhk.co/vudemijugamu/ificjdF/download_meetme_for_pc_windows_10.pdfIn PDF document text
    • https://cdn.sqhk.co/munuluxel/jbyjjtp/1_wordpress_hosting_godaddy.pdfIn PDF document text
    • http://movoxazukum.22web.org/geometry_shapes_patterns_and_designs.pdfIn PDF document text
    • http://rubka.space/33592055026mdjw0.pdfIn PDF document text
    • https://cdn.sqhk.co/zibepidok/geieaif/sekip.pdfIn PDF document text
    • https://cdn.sqhk.co/zepaginu/T3hfEjd/94910506618.pdfIn PDF document text
    • http://praktika-ingenieur.com/norman_nise_control_systems_engineering_7th_editionsffu4.pdfIn PDF document text
    • http://popularchoice.space/tanglefree_pigeon_decoysmzkxs.pdfIn PDF document text
    • http://vofovadero.22web.org/fluke_5720a_manual.pdfIn PDF document text
    • https://magifoxokepo.weebly.com/uploads/1/3/6/0/136053300/vawimazukado-fuzona-nogabigizewonan.pdfIn PDF document text
    • http://graatorama.space/wujiwenunizdlhz6.pdfIn PDF document text
    • http://tinubovibiwiwi.iblogger.org/davemoromunozegagaxit.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/jjdrjdO/bomb_chicken_wings_near_me_cheap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://juxudawalugevop.epizy.com/xunevejitod.pdfIn PDF document text
    • http://damewanobojojo.rf.gd/59817100902.pdfIn PDF document text
    • http://mufumeg.rf.gd/59506356108.pdfIn PDF document text
    • http://selifesupenikiv.epizy.com/common_aluminum_sheet_metal_thicknesses.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_off00013072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13072 5260 bytes
SHA-256: daa158134df5cb45462a6abade318c409632f94bc804ee8f62a1014b4e5e3bfc
font_01_sfnt_off00014240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14240 11068 bytes
SHA-256: 95809e5ca5d30ff1dbfc56844ce3cb5a8a94733d8768a18758727ab64bab9e68

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