Malicious PDF — malware analysis report

Static analysis result for SHA-256 59ce652b99dcd454…

MALICIOUS

PDF

84.8 KB Created: 2021-03-01 20:16:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 437128b8f422d168b3bec0b69f3a0534 SHA-1: c093607745484c61faa97c04692ac7486a250917 SHA-256: 59ce652b99dcd454eb3b1232bf2ac20df832eafa94a30f0bb50fce84210482ec
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text that appears to be part of a lure, specifically referencing an 'award'. The presence of external URIs and link farming heuristics further supports a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://jumiwimov.ru/award?keyword=i+hear+those+sleigh+bells+jingling PDF link annotation
    • http://jofufuzutaki.22web.org/83328460336.pdfIn PDF document text
    • https://cdn.sqhk.co/sobupepokor/Mnjc4gi/81729771879.pdfIn PDF document text
    • http://nikecortez.net/82281836775uk73s.pdfIn PDF document text
    • https://cdn.sqhk.co/betewulo/didijhh/crime_scene_investigation_definition_for_dummies.pdfIn PDF document text
    • https://cdn.sqhk.co/rodisukipi/1jfhgz0/merge_snake_apk_download.pdfIn PDF document text
    • http://pokezokebawi.mygamesonline.org/84303696528.pdfIn PDF document text
    • http://gajaxujifusokul.mygamesonline.org/97376623993.pdfIn PDF document text
    • https://cdn.sqhk.co/fetebutujo/b6SCjgD/44820981689.pdfIn PDF document text
    • http://zugemenelil.medianewsonline.com/sony_acid_pro_7_keygen_authentication_code.pdfIn PDF document text
    • http://rowaxamapitowej.getenjoyment.net/how_to_use_ryobi_pressure_washer_with_soap.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://xekazaz.myartsonline.com/15441212232.pdfIn PDF document text
    • http://zitasixan.atwebpages.com/29220712206.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/vazurowoj.pdfIn PDF document text
    • http://roxadib.epizy.com/78668255993.pdfIn PDF document text
    • http://dibulokesimerog.rf.gd/roririzesevumigetedif.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/28621967778.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/bylaws_s_corporation_template.pdfIn PDF document text
    • http://vulofuza.epizy.com/bet_method_for_surface_area_measurement.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF777 3312 bytes
SHA-256: cb5c8c6405a97e289a1d37fd8f3fa0fb9a9e5cd02c3f475be668e5c7f8c23a8c
font_01_sfnt_off00010358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10358 4888 bytes
SHA-256: 39d9d56e578a2f4828d19237c260c05a760b6d546c3a4d8732543339e1a827b0
font_02_sfnt_off000113e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E6 10256 bytes
SHA-256: 9869a7665c78c21bf13babaebed19d7ba7770cab720992c290120971c68491ac
font_03_sfnt_off000136fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136FD 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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