Malicious PDF — malware analysis report

Static analysis result for SHA-256 130c8000306baeb1…

MALICIOUS

PDF

76.2 KB Created: 2021-02-21 16:01:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7b6181508f9b0671e867a3ef07258649 SHA-1: b0d456e137a6f2e43558e9e6ef8bfc9d18811817 SHA-256: 130c8000306baeb1c2ce9a6377db16807a16667ffbddcc102baa977dec3b6f6c
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with a seemingly innocuous topic. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest the document is designed to redirect the user to a malicious site, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://yafferge.ru/strik?utm_term=how+to+sharpen+a+meat+slicer+blade In PDF document text
    • https://cdn.sqhk.co/vipujitebiki/idrzE8P/27870773163.pdfIn PDF document text
    • https://cdn.sqhk.co/nifodotiriru/3dCgcpv/pocket_league_story_2_cheats.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374978/normal_5fe3614fc8ac8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475380/normal_5fd3a24110ec9.pdfIn PDF document text
    • http://winoorama.site/prelude_in_c_sharp_minor_rachmaninoffoc4hg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502721/normal_6018aa303fb2d.pdfIn PDF document text
    • https://cdn.sqhk.co/nusuguponu/ji6vjdA/gatovovexavaxuvegob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450907/normal_6002dc7c80a1e.pdfIn PDF document text
    • http://pressit.fun/8498097710vople.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410717/normal_5ff3234cdfc23.pdfIn PDF document text
    • http://edaruzal.xyz/lenses_and_mirrors_applying_concepts_worksheet_answers46rfo.pdfIn PDF document text
    • http://damvglaz2.xyz/cant_connect_to_xbox_live_360_on_xbox_onej4xgw.pdfIn PDF document text
    • http://ogranicbio.fun/my_morning_jacket_at_dawn_rarvi9fa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487382/normal_5ff77703dea60.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://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_off0000e1a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A0 5292 bytes
SHA-256: e8c901ff058209a3a7d72bc446bbbee93e2ec112c4263052be548894ca37fc5a
font_01_sfnt_off0000f36e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36E 10104 bytes
SHA-256: 42610f05596276f532a96e84a4c83af9f1bfa8d8b2c08a5ad6cffc1b15a0268a
font_02_sfnt_off000115c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115C2 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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