Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3e3458c7c140d8e…

MALICIOUS

PDF

82.7 KB Created: 2021-01-11 06:44:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 454afb1f6a4d3f8d767b41cfe1e2f6a8 SHA-1: 7115728d255161bbab5f6cacfeebc8a993de4f4e SHA-256: d3e3458c7c140d8e08dbef015ced028a79049325b570f0f9dddd85dd110656e2
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by multiple critical heuristics for containing malicious redirector links and a link farm, indicating an attempt to lure users to harmful sites. The ML classifier and ClamAV also strongly indicated maliciousness. The embedded URLs point to suspicious domains, suggesting a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • 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://traffking.ru/123?utm_term=ap+stat+frq+2019 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4486994/normal_5faaf0679d66c.pdfIn PDF document text
    • https://tafibukazun.weebly.com/uploads/1/3/5/4/135400045/7471c8c07a4c701.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372735/normal_5f8966c2e9186.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/mavikusuxanala.pdfIn PDF document text
    • https://zosetujisux.weebly.com/uploads/1/3/4/2/134266291/1a66cf1e88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385869/normal_5f8ef6ffe736d.pdfIn PDF document text
    • https://zatazonikafude.weebly.com/uploads/1/3/4/3/134340422/rosifiwutujafu_nusamoxibolonej.pdfIn PDF document text
    • https://jaxedafotonomut.weebly.com/uploads/1/3/4/8/134885779/a1d5059.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
    • https://s3.amazonaws.com/vuforewebub/57455258693.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/figures_of_speech_worksheet_for_grade_8.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/sasejifisapomikigipidane.pdfIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/28371576144.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/88928585135.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/chalo_chalo_kamalamma_dj_song.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC3D 4868 bytes
SHA-256: ce48885cb67e537823944fc790609ffe1fa9c43540be40ebdb7c328f8408ea31
font_01_sfnt_off0000fcbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBD 2744 bytes
SHA-256: c58734b7c43f876d00250fe79027c28030c899bcb97b97a165465ed91b27eb93
font_02_sfnt_off00010867.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10867 12232 bytes
SHA-256: 9c7b7f4d4e7caead0a6600608eedab20a180469e3b899a754959d0b7667cb7f7
font_03_sfnt_off00012f49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F49 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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