Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe4c9b1db63ed97b…

MALICIOUS

PDF

74.5 KB Created: 2021-03-09 18:51:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c46f81e125de77036084b4abe8d98ca5 SHA-1: 92c12a5a15c01f59228ebe29d8db713e03fd59cc SHA-256: fe4c9b1db63ed97bd124b98bfdbbaad18c82e248336a8914439a4df4d7083a73
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded links to external websites, many of which are structured as a link farm for SEO purposes, suggesting a phishing or malware distribution attempt. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and a high ML score further support its malicious nature. The document body's garbled content and the embedded URLs indicate an attempt to redirect users to malicious content, likely for credential harvesting or second-stage payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 5

  • 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
  • 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://ponafet.ru/123?utm_term=pokemon+cards+online+games+free+no
    • https://cdn.sqhk.co/kamepixuxuk/gehbjwL/king_pulsa_apk.pdf
    • https://cdn.sqhk.co/xawobovuji/nohdRid/pudirawasopowuziwamusove.pdf
    • https://cdn.sqhk.co/rirerujel/hcAkRwS/game_warlords_2.pdf
    • https://cdn.sqhk.co/molavagew/hdFifgh/kagixuk.pdf
    • https://cdn.sqhk.co/vizodejo/e2mjmLm/parallel_space_64_bit_support_lite_download.pdf
    • https://musegozaxugovu.weebly.com/uploads/1/3/0/8/130873783/jetabef_panonu.pdf
    • https://lumirofelefepo.weebly.com/uploads/1/3/4/8/134892557/e5e1b5a.pdf
    • https://cdn.sqhk.co/bexefoboxevi/igiljh4/blue_moon_lyrics_dean_martin.pdf
    • https://bawigadumifop.weebly.com/uploads/1/3/4/4/134494387/vusitepevoki.pdf
    • https://nibapexi.weebly.com/uploads/1/3/0/9/130969889/f5029da.pdf
    • http://tuzitiniviwodu.22web.org/huebsch_dryer_replacement_parts.pdf
    • https://cdn.sqhk.co/modesarox/libHVgc/review_lineage_2_revolution_indonesia.pdf
    • https://cdn.sqhk.co/lusimalifa/1BYihhh/strategy_and_tactics_ww2_walkthrough.pdf
    • https://cdn.sqhk.co/wuvotalek/APkhjgA/46976603249.pdf
    • https://kofetasug.weebly.com/uploads/1/3/0/8/130874362/c313a5e0458c1.pdf
    • https://cdn.sqhk.co/lewoxiguj/dgjckjb/fulalexozumunin.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wurunuj.epizy.com/zufizavirixugu.pdf
    • https://uploads.strikinglycdn.com/files/61f17bb0-c01a-4729-9f38-88e2aa36d6ac/31770690216.pdf
    • https://uploads.strikinglycdn.com/files/c8f3ebc2-4733-41b5-8baf-827cddbd940e/bomekegiv.pdf
    • http://suzusufiwavel.rf.gd/gulafujixanobelapi.pdf
    • https://uploads.strikinglycdn.com/files/38f6c099-e2ec-4c66-98ba-faf575610cf8/beatles_sheet_music_piano.pdf
    • https://uploads.strikinglycdn.com/files/3b36ac53-64bd-402a-9c65-102fafee02cd/wenugosiwoposujidor.pdf
    • https://uploads.strikinglycdn.com/files/078984a1-ce58-4664-b41d-2ecd25292ce0/sozapanitamumanemojijij.pdf
    • https://uploads.strikinglycdn.com/files/1affc381-7e03-46e4-8f2c-82513e8816ba/15171918626.pdf
    • https://uploads.strikinglycdn.com/files/b7413210-ee9c-4a16-95c0-c698e428d34a/tasedujuzor.pdf
    • http://fibafewupo.epizy.com/5_stages_of_grieving.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6e5.bin
079f65b184462de77fa14bfa7b81a51e0bc748d5aebeb3568b5a42c229c9c75a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE6E5 5408 bytes
font_01_sfnt_off0000f939.bin
8ed1d0119d8416990d0689a0d83d5f9307cdc4f39a1fa8aec5651ab732223e60		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF939 10268 bytes

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