Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b43a4579a16d7cf…

MALICIOUS

PDF

71.5 KB Created: 2021-03-08 12:24:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: ade225e86bcef61658ead881533dc803 SHA-1: 488e6037d9039a15ef09c4a2278ca18c4810d470 SHA-256: 8b43a4579a16d7cf94186f063e83d1d5a9498912d7d7f48276fc71efaa65b70f
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xajibur.ru/award?keyword=2020+calendar+uk+printable+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420588/normal_6023e64c0743e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482219/normal_601a70fd2fb99.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385028/normal_600739cecc681.pdfIn PDF document text
    • https://menanotiji.weebly.com/uploads/1/3/4/3/134322389/ac982374553.pdfIn PDF document text
    • https://mutazodot.weebly.com/uploads/1/3/0/8/130874237/1581609.pdfIn PDF document text
    • https://bifetidenogu.weebly.com/uploads/1/3/1/3/131379340/vogutalisadadu.pdfIn PDF document text
    • https://fafetomipisiso.weebly.com/uploads/1/3/4/6/134603542/wudaverix.pdfIn PDF document text
    • http://barodowo.iblogger.org/6205418217.pdfIn PDF document text
    • https://nojabepeteguki.weebly.com/uploads/1/3/4/6/134669956/1069078.pdfIn PDF document text
    • https://bilujadaju.weebly.com/uploads/1/3/4/7/134772480/0815f00702.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388156/normal_5fdf6323ce47b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469359/normal_602ad9af3936a.pdfIn PDF document text
    • https://gadudomarun.weebly.com/uploads/1/3/4/7/134705140/bagaxabuwisop.pdfIn PDF document text
    • https://soregekewo.weebly.com/uploads/1/3/4/2/134266411/fexuba_pijowudunuvur_vozepisimeguzi_linuridonuzaxa.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/2b0d5aa8-5c32-4c49-ada0-658204b624ba/maus_tomo_1_11_edicion.pdfIn PDF document text
    • http://pusupap.rf.gd/what_is_relativity_of_simultaneity_time_dilation.pdfIn PDF document text
    • http://ginojakoli.rf.gd/pobotijebimulepagafejuje.pdfIn PDF document text
    • https://4eb3a9b5-ca6a-4b2a-896e-878abc754f3b.filesusr.com/ugd/f1ab86_22a7fbe147464ecc99a5014b9557d7f2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6646a2c-1867-4fbc-bf8e-885d6800615f/44792138896.pdfIn PDF document text
    • http://gakupoxefale.epizy.com/dometic_duo_therm_ac_troubleshooting.pdfIn PDF document text
    • http://farilofisimoru.rf.gd/importance_of_report_writing_in_criminology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81a84b7b-e297-4714-af01-0015b0457ba7/4964588683.pdfIn PDF document text
    • https://af1bea64-f5cd-41c2-a7c1-97f21c1aa057.filesusr.com/ugd/592671_75116ce74e78432e9fca5e73752adbe7.pdf?index=trueIn PDF document text
    • https://9305c775-266c-4126-9ef9-90a5cffee957.filesusr.com/ugd/c3f88d_9b20ce78ca9b49f49452ac4c058072dc.pdf?index=trueIn 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE8 5356 bytes
SHA-256: 014728d126cdf6042f4d80b58b0fffe5d6e733e0016e8cc25be0d523a5deecef
font_01_sfnt_off0000ed23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED23 10228 bytes
SHA-256: bf27a637e2cb64e65d0fda2f863e87100557be57061dc83f7b6ab885f7e7a8ca

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