Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d6c52c06243154d…

MALICIOUS

PDF

80.1 KB Created: 2021-03-21 02:26:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0612b94246130a9719c4538e2e572fa2 SHA-1: 9b2832325b703f7a8a4dd32d8a4078aa38aa6843 SHA-256: 7d6c52c06243154dbf05ddec1bfb5f6c99c02eb067718b54f91c2579db6c1d76
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are disguised as PDF documents, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://midufefew.ru/award?keyword=side+effects+of+oral+hypoglycemic+drugs+pdf
    • https://cdn.sqhk.co/zimopiroxab/ftICiiO/show_boat_drive_in_houston.pdf
    • https://cdn.sqhk.co/zapoboveje/cighahd/28903665908.pdf
    • http://bowofonu.22web.org/family_feud_game_template_free.pdf
    • https://cdn.sqhk.co/gijesali/c3rie1Q/keturineka.pdf
    • https://wugupuvexiso.weebly.com/uploads/1/3/0/9/130969254/85e45b580290b.pdf
    • https://cdn.sqhk.co/gabixeme/bjdhei7/melodyne_essential_5.pdf
    • https://cdn.sqhk.co/baxewoxevum/p0hjCt5/gavakogalubuzeba.pdf
    • https://cdn.sqhk.co/kuniremolu/PthjDjd/grave_digger_monster_truck_toy_hot_wheels.pdf
    • http://ig-copyrighthelpcenter.com/levinajegugatiwozafojividxxdo.pdf
    • https://cdn.sqhk.co/raxasumo/zifgjio/kimikapevasenukigo.pdf
    • https://cdn.sqhk.co/vipatemeluti/UeUgfje/vujujonelim.pdf
    • https://fazokovonopa.weebly.com/uploads/1/3/5/3/135329702/7801169.pdf
    • http://ericksandoval.com/495478930510yckl.pdf
    • https://cdn.sqhk.co/rovujesox/gfidief/best_video_meme_creating_app.pdf
    • http://kuzamejeluwezik.22web.org/gajujajivadigadenofo.pdf
    • https://kapelivoxiri.weebly.com/uploads/1/3/4/0/134040857/gomopaze_rokobokojop.pdf
    • https://cdn.sqhk.co/pesofesidoke/Lhgu7jd/badminton_league_mod_apk.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://faberaladaruz.epizy.com/60770648748.pdf
    • http://kiduxoz.epizy.com/40989517643.pdf
    • http://nogobixa.epizy.com/77110718259.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_off0000f93c.bin
3af77ed734db4a932e7e1cb0209568ccf535a7ac5086a96162dd0561f810f0c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF93C 5776 bytes
font_01_sfnt_off00010cc8.bin
7b32b1a1966c02a01a5a0ca0e24ca67c9ea694cc802ee4fffd10ad5c8a371cac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC8 11240 bytes

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