Malicious PDF — malware analysis report

Static analysis result for SHA-256 d217eda9a7762c8d…

MALICIOUS

PDF

77.0 KB Created: 2021-02-17 22:40:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 08b8e7938c9f8489b782d312ef16d810 SHA-1: ceed1a3986ba2d61d3359c2b761de1b661f8dc3c SHA-256: d217eda9a7762c8d9f191d2c1f05e82c343ce3a1bcf0e3699d30398c8ee58297
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics indicate it functions as a link farm, directing users to multiple disposable domains, and contains an instruction to disable security software, which is a strong indicator of malicious activity. The embedded URLs suggest an attempt to redirect users to phishing or malware distribution sites.

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
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://maypoin.ru/wix?keyword=primary+dns+suffix+of+this+computer+windows+10 PDF link annotation
    • http://healsmall.space/48443395377jpa9b.pdfIn PDF document text
    • http://doworevo.22web.org/87574004409.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381980/normal_600223334094c.pdfIn PDF document text
    • https://cdn.sqhk.co/sizafutito/eidB1ge/72513921383.pdfIn PDF document text
    • https://tofibuji.weebly.com/uploads/1/3/5/3/135309424/a395c2a4dba53e.pdfIn PDF document text
    • https://cdn.sqhk.co/zepipawetopi/SnqiiCq/jutuxakuzidimam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486213/normal_5fe6470d0e264.pdfIn PDF document text
    • http://zoompol.xyz/welivipxox0c.pdfIn PDF document text
    • https://patijunig.weebly.com/uploads/1/3/0/9/130969449/bc355b56ad.pdfIn PDF document text
    • http://copyrightprivacy.site/amped_wireless_router_manual76lte.pdfIn PDF document text
    • https://witomoniwitu.weebly.com/uploads/1/3/5/3/135317652/a772203685.pdfIn PDF document text
    • https://cdn.sqhk.co/wajerewuwer/bZgfkmv/99150592980.pdfIn PDF document text
    • https://rubajamepufukav.weebly.com/uploads/1/3/4/4/134432722/2853703.pdfIn PDF document text
    • http://monstergym.ru/liftmaster_8500_wont_work0c048.pdfIn PDF document text
    • https://cdn.sqhk.co/genizataxom/kYiggjy/yahtzee_with_buddies_dice_masters.pdfIn PDF document text
    • http://wobixoka.66ghz.com/is_google_making_us_stupid_essay.pdfIn PDF document text
    • https://fumamefix.weebly.com/uploads/1/3/0/8/130873833/xadivoxopokege.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lunijikujapike.epizy.com/55480718112.pdfIn PDF document text
    • http://putotapuzavip.rf.gd/aliya_name_wallpaper.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_off0000eeeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEB 5820 bytes
SHA-256: 55a70b9d4ab8d582e76bf156f01f9376e7bcc72eac472be9eab6c5c2d3053036
font_01_sfnt_off000102ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102BA 10472 bytes
SHA-256: 186521d453e22071101d9ab373ddc83830e395d9b21cf060eb6852682028c137

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