Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2bc9ed340c25122…

MALICIOUS

PDF

82.0 KB Created: 2021-03-19 03:47:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5780877682ac3dbf8a5f94ec5c611905 SHA-1: b5dfa9d2aed6b4ae65d3a5370f6656dc27f533ac SHA-256: a2bc9ed340c251224d78c712208b56a588585ce014b987fb83ee56ab8edfeab1
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 part of a link farm designed to improve search engine rankings for malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs point to suspicious domains, suggesting the PDF's purpose is to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://lozipotod.ru/wix?keyword=tales+of+cocktail+2020
    • http://korefubelexusiz.medianewsonline.com/ap_biology_exam_2013.pdf
    • http://ranomurivokav.22web.org/lg_vrf_air_conditioning_system.pdf
    • https://xavamukunakupa.weebly.com/uploads/1/3/1/4/131437969/wapubopinan.pdf
    • http://xepuxesadara.mypressonline.com/tipos_de_sistemas_de_informacin_en_una_empresa.pdf
    • http://eurostore.info/sezum91khf.pdf
    • http://nobirejajatit.iblogger.org/walter_bagehot_lombard_street.pdf
    • https://rogubofiduga.weebly.com/uploads/1/3/1/0/131069879/fccc2297a0.pdf
    • https://kusikulovaledif.weebly.com/uploads/1/3/1/6/131606813/9811105.pdf
    • http://turopedadogexub.22web.org/37339919823.pdf
    • https://dixozetazexode.weebly.com/uploads/1/3/4/4/134472526/6196352.pdf
    • http://good-production16.site/69184578929qn402.pdf
    • http://biniwitovo.mywebcommunity.org/36160742318.pdf
    • http://teagreen.space/sports_car_racing_games_play_onlinevkin4.pdf
    • https://jusopusoguwukul.weebly.com/uploads/1/3/4/4/134494455/zejojubili.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://giworutiw.myartsonline.com/79377451715.pdf
    • https://f6ce3cfb-f922-470c-9e0e-eaf724001b0e.filesusr.com/ugd/defcb2_0e5bbb9d21d94a25b8de478bf64f0315.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2d9b410a-d67b-4492-aa73-fb0ec97d8e8b/juvalovo.pdf
    • https://uploads.strikinglycdn.com/files/bc67e57c-bd64-4215-b899-6dc29a37d966/epson_3020_bulb_life.pdf
    • https://e8dc5420-792a-4861-90db-09cfc8d8a7d1.filesusr.com/ugd/1378f5_bf0d5ca753044466aa7a0059e47b27f7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/5e29bef7-c63d-49e5-8e6c-90755f7f8d05/should_i_refinance_mortgage_to_15_year.pdf
    • https://uploads.strikinglycdn.com/files/7c62a2cb-4a47-4215-ab8b-102a14f7a0db/dozidirifalelanowalu.pdf
    • https://4ef57e19-9a2e-4e6f-a444-f6b59f982a39.filesusr.com/ugd/4c1554_40c85fb5f7e94165ab955ae9d6ae70a1.pdf?index=true
    • https://69df74eb-9f83-488d-97bb-abb55063df61.filesusr.com/ugd/f34323_aeaca15714b64d19a523b3708d04ee5a.pdf?index=true
    • https://86a9da1b-0b57-4b35-a77a-523886b904cd.filesusr.com/ugd/0d9a50_e56c3a20186747a9b2c3097ca0655d50.pdf?index=true
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f31f.bin
67bf671de7957e47a030a98745e2084254b95b13cca98ffc2188009f760a6d98		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF31F 4748 bytes
font_01_sfnt_off0001034b.bin
f39c56997f28ae1ee8dd1771f77528ade701075d12291f6117f6256016c181f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1034B 11900 bytes
font_02_sfnt_off00012b04.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B04 4324 bytes

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