Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc4a34c42ccd3abb…

MALICIOUS

PDF

79.9 KB Created: 2021-02-14 15:08:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: e781e5dcdb0799f98a9ebfa06d297ccb SHA-1: 7abea4d3fabfd83a544170d33e902dde99fc5c4a SHA-256: fc4a34c42ccd3abb92edbcd2e0f60099d4e31b252696dfb60cb3601b87bc1b49
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and a machine learning classifier, with ClamAV detecting it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, forming a link farm. The document body, though heavily obfuscated, suggests a lure related to 'manual folding machine sheet metal' to direct users to these malicious URLs.

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://seumenha.ru/wb?keyword=manual%20folding%20machine%20sheet%20metal PDF link annotation
    • https://cdn.sqhk.co/bujiwamovul/jeFiaH5/jeduza.pdfIn PDF document text
    • http://yoptan.space/rifibibigesagosogowadijibel0g1.pdfIn PDF document text
    • http://gachihyper.xyz/37805140825y26lq.pdfIn PDF document text
    • https://cdn.sqhk.co/rorazelesu/cQjdjhv/noona_swipe_brick_breaker_cheat.pdfIn PDF document text
    • https://cdn.sqhk.co/kanereneb/rAQigja/map_my_run_apple_watch_series_2.pdfIn PDF document text
    • http://lnstagramservicecopyrights.com/62522590683vxqfn.pdfIn PDF document text
    • https://lafezarawowaw.weebly.com/uploads/1/3/0/8/130874252/lunexekeme_wisijoxejotiv.pdfIn PDF document text
    • https://limorevoxa.weebly.com/uploads/1/3/4/6/134611026/5684130.pdfIn PDF document text
    • https://cdn.sqhk.co/mipekakiri/hgeigia/kobofasib.pdfIn PDF document text
    • https://wituxilozixataw.weebly.com/uploads/1/3/5/3/135317309/7ff596d8fdd21b.pdfIn PDF document text
    • https://cdn.sqhk.co/tubafejog/gdguxX9/32495478095.pdfIn PDF document text
    • https://nibapexi.weebly.com/uploads/1/3/0/9/130969889/sowebudoxi-videwekajewuzo-leresofupa.pdfIn PDF document text
    • https://cdn.sqhk.co/legusovej/hawkig0/19175104707.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvevevef/6ygjlij/group_home_program_manager_job_description.pdfIn PDF document text
    • https://cdn.sqhk.co/xoradofexul/jjdgchf/kiwukoxagizavafutakis.pdfIn PDF document text
    • http://detonic-ordina.website/751569363409yb31.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvinudubuno/hciduij/91421329430.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kugofabafomozo.epizy.com/silabus_biologi_sma_k13_revisi_2018.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_off0000e354.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE354 5344 bytes
SHA-256: a93d13ffabea99857a930b554e1012ecbd035ea215f880a9a94d8dccdedf03f9
font_01_sfnt_off0000f571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF571 11588 bytes
SHA-256: 3e5d4c6eba97fc1fcc7eb68d573895ccb6cda5f4298c874c66991f57a50eae0c
font_02_sfnt_off00011c6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C6B 16164 bytes
SHA-256: 4bd16c8abd39118228c1571b0005d4eb3b3e943e572fd92a2a80cfcb7b749349

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