Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d4af7ce895a0e8f…

MALICIOUS

PDF

66.4 KB Created: 2020-12-24 10:45:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 10c0394820629ac63a3f35970fa187db SHA-1: bf10300b6d7ceb2a98fcbb5b039cee8db3e6e7dc SHA-256: 5d4af7ce895a0e8f746f1d9e257d124fb593bdbaf20b6ba7c43a86fbdc8f5292
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and an ML classifier, with ClamAV detecting it as a phishing trojan. The document contains a mass of external links, including one to 'trafffe.ru', suggesting a link farm or phishing attempt. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links indicate an attempt to redirect the user to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://trafffe.ru/strik?utm_term=dark+forest+wallpaper PDF link annotation
    • https://dudafenerow.weebly.com/uploads/1/3/4/9/134900552/kipuzujirulezana.pdfIn PDF document text
    • https://xitukuwelup.weebly.com/uploads/1/3/4/3/134340625/acba796e1.pdfIn PDF document text
    • https://cdn.sqhk.co/pupevadojas/bgehcjh/skyrock_radio_en_direct_gratuit.pdfIn PDF document text
    • https://faxofisokat.weebly.com/uploads/1/3/4/5/134598269/e99671e1b.pdfIn PDF document text
    • https://cdn.sqhk.co/kupovite/WVjbjjG/sword_battle_sound_effects_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375894/normal_5f8a969bb50b1.pdfIn PDF document text
    • https://xodinelexobi.weebly.com/uploads/1/3/1/4/131438891/009263719520.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/aaruthra_video_song_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/apache_tomcat_installation_guide_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/tazojumujotizig.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/legelapuforofew.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_off0000b170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB170 5052 bytes
SHA-256: 1819a168e0bbe1875fd267316e6ee5575f4ae7305b957b9a4f575bad725f66c8
font_01_sfnt_off0000c2cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2CB 10968 bytes
SHA-256: 93fe01832ab6f59247f8254ce21f2dcd7b219baceb5268c3f92b6fe15a1f6c01
font_02_sfnt_off0000e7ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AE 16164 bytes
SHA-256: 3f70697d8cfd0b9becff5adcad726f9ffedcc5d773cc6f7abbcc82b2f8034994

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