Malicious PDF — malware analysis report

Static analysis result for SHA-256 a020655b98bca102…

MALICIOUS

PDF

79.8 KB Created: 2021-02-23 03:16:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: dce1a164fc3952779398c608fc725c6b SHA-1: 2bcc6416edebb97e8a5cd880afeeb58c94115a34 SHA-256: a020655b98bca102419a60765d688a189a51b401b5bd33d75c0f072498c31b8b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by heuristics as a link farm designed for SEO. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://leonvi.ru/wix?keyword=dnd+5e+battle+smith PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4469365/normal_5fe18936258fb.pdfIn PDF document text
    • https://xumebarukez.weebly.com/uploads/1/3/4/6/134687090/bizetetirisut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473916/normal_6033f1d10bae5.pdfIn PDF document text
    • http://vidoxilaxugak.22web.org/spreadsheet_topic_ideas.pdfIn PDF document text
    • https://budemarapi.weebly.com/uploads/1/3/1/3/131381681/5852303.pdfIn PDF document text
    • https://cdn.sqhk.co/wakivugex/ghCshct/alita_battle_angel_anime_movie_download.pdfIn PDF document text
    • https://vepenisa.weebly.com/uploads/1/3/4/3/134339982/mazub.pdfIn PDF document text
    • https://cdn.sqhk.co/nigulavax/cxAiggg/stokke_tripp_trapp_harness_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417806/normal_60344f6a6bd53.pdfIn PDF document text
    • https://cdn.sqhk.co/mewuxedodi/jfgjieW/lawaberetedetarabog.pdfIn PDF document text
    • https://cdn.sqhk.co/wibetaxor/caDyGq7/42076296776.pdfIn PDF document text
    • https://rorawakufajixe.weebly.com/uploads/1/3/4/6/134653883/938616.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369323/normal_5fe256bf4d5d1.pdfIn PDF document text
    • https://cdn.sqhk.co/nigulavax/gfxWE3s/71938460049.pdfIn PDF document text
    • https://xomilazarega.weebly.com/uploads/1/3/4/5/134511507/ziwozel-xemobitujitido-diwaxobar-kugupoja.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://fasilew.epizy.com/20055569381.pdfIn PDF document text
    • http://wubavon.epizy.com/69251083945.pdfIn PDF document text
    • https://s3.amazonaws.com/desenaz/43461252025.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/bapunuxeparonivar.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/farifelozasewilutafukipi.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/nth_term_of_arithmetic_sequence_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/limepusotanal/nice_guidelines_uk_copd.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDE 4908 bytes
SHA-256: 21235cef4f0d92255895198769c6eb8a09ba3ec210ae8fd8cf94f60bfbef995b
font_01_sfnt_off0001005f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005F 10352 bytes
SHA-256: d70d01e6a909c1866d804eda6ce6188d85f3bf0f960270397fed04674176df75
font_02_sfnt_off000123b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123B4 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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