Malicious PDF — malware analysis report

Static analysis result for SHA-256 746ead524cf84b29…

MALICIOUS

PDF

94.3 KB Created: 2021-03-28 07:02:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6b410ef22e740457bc6377d60d877543 SHA-1: b44d35a37d53f950ac488f12245fda20bf91e352 SHA-256: 746ead524cf84b295c6f40ed72ffbdcd91313cdea6d2090b55d828afc377b243
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which are to disposable domains, indicating a link farm or SEO poisoning attempt. The primary URL, "https://gimoguvi.ru/strik?utm_term=oyama+tro-110c+turbo+convection+oven+manual", is presented as a manual but likely leads to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://gimoguvi.ru/strik?utm_term=oyama+tro-110c+turbo+convection+oven+manual PDF link annotation
    • https://cdn.sqhk.co/zovifesojeme/dK3phiY/zombie_sniper_evil_hunter_hack_apk.pdfIn PDF document text
    • https://zatenumidepav.weebly.com/uploads/1/3/0/7/130776458/2850384.pdfIn PDF document text
    • https://wigewowatabosaz.weebly.com/uploads/1/3/4/3/134352056/9748595.pdfIn PDF document text
    • https://gawokuvaz.weebly.com/uploads/1/3/4/6/134656265/xotamugurem.pdfIn PDF document text
    • https://cdn.sqhk.co/wajewukudino/hjiogg2/geometry_dash_demon_list_scratch.pdfIn PDF document text
    • https://kagamufoxigog.weebly.com/uploads/1/3/4/0/134013308/2977369.pdfIn PDF document text
    • https://sibomimotilelib.weebly.com/uploads/1/3/4/2/134235458/muwurimi.pdfIn PDF document text
    • https://makaxifosezopuv.weebly.com/uploads/1/3/4/5/134511124/pokufikonidigisowi.pdfIn PDF document text
    • https://cdn.sqhk.co/fuxiwimemo/hfUgdic/78382355659.pdfIn PDF document text
    • https://cdn.sqhk.co/vejurumilef/b32mgjd/refapinutemijel.pdfIn PDF document text
    • https://cdn.sqhk.co/kubezuvare/SbOB4mg/dinobazuvijezifizuzujirel.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/kubedukowug/how_to_fix_overscan_on_tv_windows_10.pdfIn PDF document text
    • https://4461694d-a6f7-4a69-895a-ff5ddeb3c622.filesusr.com/ugd/f504fb_20fe1664498f4620a0bddb69ed0ffc35.pdf?index=trueIn PDF document text
    • https://5090c2af-253d-40c3-bfb7-942fc6db26b0.filesusr.com/ugd/0511f5_e770015e70f24b5388e3aed2eae1b77c.pdf?index=trueIn PDF document text
    • https://ce2645ba-e89a-43d5-afff-5c0150757291.filesusr.com/ugd/c63dba_8ff0aa7b9f2346a08bc7410172136121.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/zuboj.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_off00011454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11454 5320 bytes
SHA-256: d17b26014db91da55821b0159ba051b1517b5534ba6b9376294acf97acfa3c68
font_01_sfnt_off0001266a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1266A 14204 bytes
SHA-256: 8f24b6c96dd9810e92dc02bc082b877a48d4709b4a5430f07f052116ef9d8287
font_02_sfnt_off000155d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155D1 16352 bytes
SHA-256: ee07d6938d54d9d33d162cf674788830b32868ca4d88d981b0c959068b471cf0

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