Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ebdcee660a83e9a…

MALICIOUS

PDF

79.8 KB Created: 2021-05-27 00:07:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 1d74ec9e4f3301b571f5eacf43c78ac3 SHA-1: 224168b25735c00a5195faed2e45a8a3ceca8b09 SHA-256: 7ebdcee660a83e9a46d175bad300f62fc81601b67202666f00246c0e24cd72ee
186 Risk Score

Malware Insights

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

The PDF contains a link farm with numerous external links, many pointing to disposable hosting services, suggesting a phishing or scam campaign. The primary URL, dugedepap.ru, is associated with a lure for downloading an Android game, likely to deceive users. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://dugedepap.ru/strik?utm_term=pokemon+x+and+y+game+download+for+android+apk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4418401/normal_6010d52a9dee7.pdfIn PDF document text
    • https://jakilirimilibev.weebly.com/uploads/1/3/4/8/134862861/goporobexom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465025/normal_5ffd45420dd1d.pdfIn PDF document text
    • https://nulevilisibonu.weebly.com/uploads/1/3/4/5/134585613/5aae5fbe1cbe350.pdfIn PDF document text
    • https://kurakozizuvev.weebly.com/uploads/1/3/2/6/132681999/935977.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369905/normal_601e602ae882a.pdfIn PDF document text
    • https://luvisusarav.weebly.com/uploads/1/3/6/0/136011852/8945775.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446380/normal_60290c581d8e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369327/normal_603885d6f212f.pdfIn PDF document text
    • https://bawekiseboluxis.weebly.com/uploads/1/3/5/3/135327810/7621309.pdfIn PDF document text
    • https://rivatuvimib.weebly.com/uploads/1/3/4/4/134469475/bigikabenuvegotug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447914/normal_601e0216a7a1c.pdfIn PDF document text
    • https://kubazavazagemu.weebly.com/uploads/1/3/4/4/134464578/fipanewelurev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368763/normal_603861ec210a0.pdfIn PDF document text
    • https://gubotejulide.weebly.com/uploads/1/3/4/3/134380330/961c9880.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/432bd582-df47-4f77-ab7c-1069263e48ea/perixogamisoza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14cbd183-cbc5-4ee8-9a8e-26e499febbe2/marvel_vs_street_fighter_wolverine_moves.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac477420-9f1a-43f8-8677-7e216e0cb8b0/17428245139.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d20df7df-bbb0-4b37-ab9b-bb9e97060f7e/good_luck_in_spanish_slang.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d78e20f-9839-4b28-80a1-81bd4ca3c427/what_is_another_word_for_solutions_of_a_polynomial_function.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f084.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF084 5512 bytes
SHA-256: afe980015094be24adcb3c79bb25610a5cc6d63972eb532328e7569f3f673c48
font_01_sfnt_off0001034b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034B 2116 bytes
SHA-256: 991f7ef292b59849fa1804c361c52a6255426db797fbcab3b5d31d1f34ee76c9
font_02_sfnt_off00010cf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF6 10684 bytes
SHA-256: 1f37fa258a32d93e933e49898a0f7ff910ddd5c012f10c1a43800674205adc24