Malicious PDF — malware analysis report

Static analysis result for SHA-256 6718970c01597ba7…

MALICIOUS

PDF

75.5 KB Created: 2021-03-14 09:53:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5183f56ea8ca9820403d929be3eef660 SHA-1: 9beffca12fe40626f75139d18cfbd76d0534d4c3 SHA-256: 6718970c01597ba779d5b635b6af4e2622387ab07dcea6a4a72c911ed536fd7c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are generated to appear as SEO-friendly content, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://soxebez.ru/wix?keyword=ffxiv+food+guide+stormblood
    • https://cdn.sqhk.co/pekebugus/7iaET8l/80606430930.pdf
    • https://pazumiwasosum.weebly.com/uploads/1/3/4/8/134892739/gifugarotor-fodisipurigon-netapawab-vokijavekakado.pdf
    • https://cdn.sqhk.co/burajugi/ghhdjeY/sears_going_out_of_business_sale_near_me.pdf
    • https://cdn.sqhk.co/bomunerafoju/hfjjZat/photo_video_maker_app_with_song_for_android.pdf
    • https://letonezesuju.weebly.com/uploads/1/3/1/3/131383444/migirinise-wabuvok-lidevaze-pejavagiboraloj.pdf
    • http://bidetoluji.getenjoyment.net/kindle_fire_hd7_4th_generation.pdf
    • https://modotetizifoxi.weebly.com/uploads/1/3/1/6/131637555/8837816.pdf
    • https://cdn.sqhk.co/vefusujix/eW2jfja/zitadobowes.pdf
    • https://cdn-cms.f-static.net/uploads/4388813/normal_6034fbc1f12db.pdf
    • https://cdn.sqhk.co/jabosuve/hhehhhf/96418073902.pdf
    • https://cdn.sqhk.co/moturira/jf7idgR/68653074132.pdf
    • https://tokuniti.weebly.com/uploads/1/3/4/3/134331772/novoloma.pdf
    • https://static.s123-cdn-static.com/uploads/4377380/normal_60052e4f772d1.pdf
    • https://cdn-cms.f-static.net/uploads/4452398/normal_604db35a720ff.pdf
    • https://xasukibumit.weebly.com/uploads/1/3/4/7/134749231/4119426.pdf
    • https://cdn.sqhk.co/rudugebakivo/xggpjfU/hopeless_raider_fps_shooting_game_mod_apk_download.pdf
    • https://cdn.sqhk.co/zinoliwomi/2ijicgi/12141888065.pdf
    • https://cdn.sqhk.co/jesisuvov/jh4Kzje/cute_anime_wolf_girl_gif.pdf
    • https://cdn.sqhk.co/pijovowifil/higcjjx/gawufivarerixuteboti.pdf
    • https://static.s123-cdn-static.com/uploads/4471969/normal_5fe5fbd4216a5.pdf
    • https://static.s123-cdn-static.com/uploads/4365547/normal_6004b538d808a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/divelikubapiwaj/23665211487.pdf
    • http://kifesafijupesob.onlinewebshop.net/every_mans_battle_book_summary.pdf
    • https://s3.amazonaws.com/vabedafozo/29439408169.pdf
    • https://s3.amazonaws.com/mubemutolewe/35420574045.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_off0000e8ff.bin
6726ded45b2f739e299d21f5b5e41814af627274cde41c2ea6a18fe851d55558		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FF 5240 bytes
font_01_sfnt_off0000facf.bin
3bab95433ff0eebaa6404ee71dbc8a81e6e915484c867ad154b3d1167ea7e35e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFACF 11056 bytes

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