Malicious PDF — malware analysis report

Static analysis result for SHA-256 701949efcc53d6f5…

MALICIOUS

PDF

70.1 KB Created: 2020-11-27 03:34:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d82e6d963ee640b252280f54c41115ec SHA-1: dd527d1b3e1de98aed8202a5399cb845999e5cef SHA-256: 701949efcc53d6f51a3a5162a309ee0d940079f333c431a7feb41e83318e1fa4
214 Risk Score

Malware Insights

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

This PDF file contains embedded links that redirect to known malicious infrastructure, specifically a URL associated with phishing and malware distribution. The document body, though heavily obfuscated, contains text related to a game download, which serves as a lure. The presence of multiple PDF links and a critical ClamAV detection further supports its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://traffmen.ru/strik?utm_term=snail+mail+game+download+for+android
    • https://cdn-cms.f-static.net/uploads/4465267/normal_5fa59067256bd.pdf
    • https://jufozovujibozom.weebly.com/uploads/1/3/4/3/134360308/zekuna.pdf
    • https://tijogarukaro.weebly.com/uploads/1/3/4/7/134710746/zugelitali_kaxemesokazusij_tonubiza.pdf
    • https://cdn-cms.f-static.net/uploads/4403688/normal_5fa9e865ee39a.pdf
    • https://cdn-cms.f-static.net/uploads/4465949/normal_5fa5127c7db34.pdf
    • https://cdn-cms.f-static.net/uploads/4474722/normal_5fa6c04a681d6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/vibuvomomuv/building_construction_diploma_book.pdf
    • https://s3.amazonaws.com/tanikanaw/essae_ds-_450_calibration_manual.pdf
    • https://s3.amazonaws.com/zuponefi/favevepamuw.pdf
    • https://s3.amazonaws.com/kibavutibeved/beatles_sheet_music.pdf
    • https://s3.amazonaws.com/palevijuj/manual_for_maytag_refrigerator_plus.pdf
    • https://s3.amazonaws.com/bifamomove/wusut.pdf
    • https://s3.amazonaws.com/potevip/63922104423.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c155.bin
895c9cb12655e4ebb05ad7a15a36ed331315689dd52aad322eb8be532b33f954		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC155 5244 bytes
font_01_sfnt_off0000d327.bin
d3626fb3f78e98807b58e741ea2d0b3301e465f26864f03ab1c79e39e9679612		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD327 10096 bytes
font_02_sfnt_off0000f60a.bin
e27d447be23f4a5878aa8f90d4fbedb7249f2f97905a474d092cfa4504df75e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF60A 16236 bytes

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