Malicious PDF — malware analysis report

Static analysis result for SHA-256 c701a6b3c9df0017…

MALICIOUS

PDF

86.8 KB Created: 2021-05-22 19:30:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 497db57ac0ba7567d389035ab0636b1c SHA-1: c5ab8945a7eb3b2ab8c3c5ab846bc0e695807179 SHA-256: c701a6b3c9df00170fe03d579427a2ce95e08c89f594da838b559f8a01cd561f
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. One prominent URL, 'https://fokemale.ru/strik?utm_term=nagpuri+dance+video+dj+mein', is presented as a lure for a dance video, likely to entice clicks. The presence of ClamAV detection and ML flagging indicates malicious intent, possibly involving the exploitation of PDF vulnerabilities to redirect users or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://fokemale.ru/strik?utm_term=nagpuri+dance+video+dj+mein PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4499972/normal_5fece6a94086e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420586/normal_6004daf66db0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380393/normal_60113d196bf68.pdfIn PDF document text
    • https://tuwavufubuxa.weebly.com/uploads/1/3/3/9/133997694/5086f28294fa6.pdfIn PDF document text
    • https://vujanakisa.weebly.com/uploads/1/3/4/4/134401771/rekudijiduzatez.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478415/normal_5fc83cf8c17a8.pdfIn PDF document text
    • https://koxawikala.weebly.com/uploads/1/3/4/6/134643159/ligupuwuku.pdfIn PDF document text
    • https://lorumotavur.weebly.com/uploads/1/3/4/6/134693112/pikafovexodi-leguzuxu-wepujusune-vuwepub.pdfIn PDF document text
    • https://jelugofinetala.weebly.com/uploads/1/3/5/3/135389066/844060.pdfIn PDF document text
    • https://rokaxitifefisol.weebly.com/uploads/1/3/4/0/134040577/3645746.pdfIn PDF document text
    • https://duzareledibasa.weebly.com/uploads/1/3/4/8/134890493/5220503.pdfIn PDF document text
    • https://metiganad.weebly.com/uploads/1/3/4/6/134659194/e6958573ab609.pdfIn PDF document text
    • https://dunomomavelow.weebly.com/uploads/1/3/1/4/131407267/458e0a3204d145.pdfIn PDF document text
    • https://rekinijibir.weebly.com/uploads/1/3/2/3/132302710/4851489.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/ratobid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9fe89977-ec34-4315-b6d7-7b6bf8cd2de4/74092795921.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f3694c1-5581-4c0f-806d-d091d7cd2df5/dutojazi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11ab7c20-1787-448b-af0e-45dc6f8b23e5/the_holy_quran_recitation_with_urdu_translation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d252880d-db76-4ed9-b021-94074258c3ed/yaesu_vx-6r_operating_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57184de9-8bd6-4d53-9852-a16a70f4bbfc/31799945977.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/298ffbc2-12e7-4b8c-b0f0-3ccefebcaf09/fepebaripoli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45fbdbf3-e4a6-4e6e-b995-3cba8ffbb972/bupusujonuwuwuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/798ddcd9-29b0-4027-88da-27d2387eed54/fojokajudadibidabu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d91d086f-be3a-4134-9e94-f2626ad75ee3/85991899139.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/gexozumidodaje.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD4F 5288 bytes
SHA-256: c79fdcf1e983fbcc5510a207ed0a0d9ce06d5a93aca58931b586971b59467c4e
font_01_sfnt_off0000ef4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF4A 2024 bytes
SHA-256: 676e5bcac31b85a43619e53daa848c5f9174c5fb57bf952bee78dd1d7d701afb
font_02_sfnt_off0000f8ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AC 11976 bytes
SHA-256: e969c075a5c4bb99289e9ec7a2b051a0f34c081e5b13ae0be3fcd17155b8b666
font_03_sfnt_off0001218e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1218E 16272 bytes
SHA-256: eaa733e25afeee6afbbe33d64cb9211a9d97d08ad42b4d94d7a23d85b1848037
font_04_sfnt_off00013759.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13759 5188 bytes
SHA-256: c06fa37b065513b754d4e9660aa371cc8ec5ef48883c789bda2c860320ac9e9f

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