Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a4947066f98244f…

MALICIOUS

PDF

83.7 KB Created: 2021-02-28 20:54:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ac6a6c765dbbd4a235e1555271b14015 SHA-1: d9efa1d914b0bad8615c037a3202cb93537a1867 SHA-256: 2a4947066f98244f42599bd755ab663933cbe83b75bfdbd35242def834523b27
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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/wix?keyword=word+whizzle+answers+for+gullible PDF link annotation
    • http://volamejabevakik.22web.org/mivubogug.pdfIn PDF document text
    • http://lejifip.sportsontheweb.net/84917858067.pdfIn PDF document text
    • http://fejukoturig.medianewsonline.com/taxig.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/cuales_tipos_de_sistemas_operativos_existen.pdfIn PDF document text
    • https://penopamez.weebly.com/uploads/1/3/4/4/134496097/9491503.pdfIn PDF document text
    • https://wozizagozesa.weebly.com/uploads/1/3/4/8/134848764/9628629.pdfIn PDF document text
    • http://mikovil.mywebcommunity.org/the_game_awards_voting_results.pdfIn PDF document text
    • https://dijodiruji.weebly.com/uploads/1/3/4/0/134097483/6010130.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/pufixozatopulat.pdfIn PDF document text
    • http://tivunuvuzamiguj.22web.org/quell_instruction_manual.pdfIn PDF document text
    • https://nifirasevaxo.weebly.com/uploads/1/3/4/7/134756957/pupebetanum_regefezawa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duxegejuw.atwebpages.com/65548327956.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/35475779668.pdfIn PDF document text
    • http://novogizeboje.myartsonline.com/why_is_the_dryer_not_drying.pdfIn PDF document text
    • http://kowuvemanavo.rf.gd/zusavenabewapet.pdfIn PDF document text
    • https://s3.amazonaws.com/jalasilunaz/when_did_we_enter_ww2.pdfIn PDF document text
    • http://fuzaxovojige.epizy.com/memuvaw.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/18427785391.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f15b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF15B 5464 bytes
SHA-256: 4c482464a9d8f76ba3a2de1d8d4502f49aebe6fb6c40a64ad445483640a6d4e6
font_01_sfnt_off0001040c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1040C 12496 bytes
SHA-256: aef4d42dbbb481bdb1f6da85da3d7a5fd78c4a256f027ae9e8ed5842e531948c
font_02_sfnt_off00012c94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C94 16060 bytes
SHA-256: 73f6f760a67782f27700c3ed047511a210a1e3765a9cc4fd416c63ff6a2522af