Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad95e50e7ca4b637…

MALICIOUS

PDF

110.7 KB Created: 2021-03-18 06:47:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: bd4b9d7b652a73104329bfe02093c754 SHA-1: bdf622151c2e3dc95962bd9deb7c4eddf894b53d SHA-256: ad95e50e7ca4b6370617d838452ebc86bf636c72bb960600e60ee74d56a97661
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an external URI pointing to a suspicious domain, likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, contains text related to 'Taylor's theorem', suggesting a lure to disguise the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9938

Heuristics 5

  • 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 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://vilenefex.ru/strik?utm_term=taylor%2527s+theorem+in+complex+analysis PDF link annotation
    • https://cdn.sqhk.co/dijowasedop/Njbhcgf/parent_plus_loan_consolidation_calculator.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410954/normal_6019c971824cc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466673/normal_5fce6bf380a82.pdfIn PDF document text
    • http://worldworkbook.com/how_long_does_it_take_to_get_a_diabetic_cat_regulatedcjhwb.pdfIn PDF document text
    • http://construt.site/20967668489wxisd.pdfIn PDF document text
    • https://cdn.sqhk.co/tulotunofuz/O6TPKhb/candy_crush_farm_heroes_saga_apk.pdfIn PDF document text
    • http://myfoxing.online/bebupaxoboroganuxphsx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369907/normal_5fefcfc16afac.pdfIn PDF document text
    • http://mavitrade.com/fasciolopsis_buski_nediryafky.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446914/normal_5fc6bd47dd454.pdfIn PDF document text
    • http://buyervannakupitvsem.xyz/cara_menggunakan_minergate_di_android8bydv.pdfIn PDF document text
    • https://cdn.sqhk.co/domonuxasi/jhfD5qh/86881998262.pdfIn PDF document text
    • https://cdn.sqhk.co/wotirixa/jghG2Uj/end_of_animal_sacrifice_in_the_bible.pdfIn PDF document text
    • http://private-channel.site/gateway_b1_test_answers_unit_5ezll3.pdfIn PDF document text
    • http://kyukty68.xyz/star_trek_the_next_generation_season_1_episode_8_dailymotionk655n.pdfIn PDF document text
    • http://good-production18.site/abstract_reasoning_practice_test_with_explanationuya28.pdfIn PDF document text
    • http://servisvds.ru/restaurants_near_cross_roads_txslbv0.pdfIn PDF document text
    • https://cdn.sqhk.co/defisepeniba/IRgfBjb/sopaduxadazidego.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://18282f24-d4e3-4c19-b4d9-8e3fdaa82145.filesusr.com/ugd/df2b7b_0133aa7a162c4d49aab1ad41f025b4f7.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/423830ec-1255-4398-ad9d-ddcb50b055d8/test_de_inteligencias_multiples_psicoactiva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/453fa657-6a4f-494d-9408-f5a46e5e63ef/fevudirojexijefiseti.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98da183f-0543-41ed-9f9e-d43109e456e8/momax.pdfIn PDF document text
    • https://d56a38bf-d62e-453c-9b5b-5b2fe88aea46.filesusr.com/ugd/359e64_0f42f14b00c548febe899dc746ff37c8.pdf?index=trueIn PDF document text
    • https://6d4cd3b7-91e9-43ac-92b9-205473f1e50d.filesusr.com/ugd/28146e_258b79c65f4144e49f251887009ab8cd.pdf?index=trueIn PDF document text
    • https://4cf2acc4-d143-4013-a78d-f21de0873c4f.filesusr.com/ugd/e4636f_e63da517228f4308b602a59eee859ed2.pdf?index=trueIn PDF document text
    • https://0c2a99dd-71fd-4a0d-b96f-672cfa785c21.filesusr.com/ugd/515c54_bea19fcbe2334f3fbc9475092c461c86.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/80a12b68-eaff-4a61-bffe-39dc78fbf4c6/32345649488.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_off000153e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x153E6 5324 bytes
SHA-256: 76f7a8a42303a6fdcc5b4fd5d648bd1098583c36bed778bcab1fc3eada6506a6
font_01_sfnt_off000165ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165EA 13892 bytes
SHA-256: 0053c02ee3f6e9be8e243100c67224ee987e6b5e78a6dafc7471ddfa8cfc9923
font_02_sfnt_off00019534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19534 16516 bytes
SHA-256: a2838e736619e74d4c93a21df8f64f1fa6ad5b622198b4a106b8e70aa3303a02

Open this report in the interactive analyzer, or submit your own file for analysis.