Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d23cc8f028ec66b…

MALICIOUS

PDF

80.9 KB Created: 2021-03-13 22:52:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: bd16581d2ca4f9a32cf4e2a9abbfe602 SHA-1: a5c08c633fafa520e030f017a0d215e28d2569cf SHA-256: 0d23cc8f028ec66b71eaf4bbdf0e7fc890dcbc44528be1d2647d6e7bc4dd43bc
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs and heuristics indicate it functions as a link farm, directing users to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://mezovuduw.ru/award?keyword=business+plan+sample+for+supermarket+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4390664/normal_5fdc826c55f52.pdfIn PDF document text
    • http://wei-nmvc.com/229429152597jdn6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370317/normal_5ff7d0c4cdcff.pdfIn PDF document text
    • http://nukicew.xyz/timuvetafu7bqpr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375093/normal_60240f205ba04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369309/normal_6029711316cd2.pdfIn PDF document text
    • http://uabiomanix.xyz/565010783908bu55.pdfIn PDF document text
    • https://jibunomo.weebly.com/uploads/1/3/5/3/135348462/mabaloxilo_nasemigur_figejut.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489050/normal_5fca82cb6895a.pdfIn PDF document text
    • http://tryraisins.club/xikukisatamqimcf.pdfIn PDF document text
    • http://peuer.xyz/the_hateful_eight_extended_version_parents_guideuurg6.pdfIn PDF document text
    • https://romixizu.weebly.com/uploads/1/3/4/8/134887474/004ef238f1.pdfIn PDF document text
    • https://gomimujexewawid.weebly.com/uploads/1/3/1/0/131070583/dexug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/zupenafud/how_to_get_marvel_contest_of_champions_units.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0c8fed8-90c1-4dc8-829a-5c24bfc5d1bb/10384719390.pdfIn PDF document text
    • https://34886cf3-15ed-44db-93e8-8979dc7c4cd7.filesusr.com/ugd/ea2c45_8424547c73e144c9b40e221b00ac1517.pdf?index=trueIn PDF document text
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_743f5bad715e4a31a6def983067fac17.pdf?index=trueIn PDF document text
    • https://ecfc1f44-6648-4072-bff5-6ee4adcfbe4f.filesusr.com/ugd/e5a943_cbc8393af7f144f88c7b35e044aeaa40.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c00d5e52-24cb-4d15-98a9-aced863d1a4c/89474730997.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/37231262998.pdfIn PDF document text
    • https://937a8a2d-b41a-4163-aff8-eda6db263557.filesusr.com/ugd/21e6f2_dc05e90da0214725a1b3d7b8d2aa3845.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cd2bc87-779d-4a19-993a-15885f67ca9f/the_tattooist_of_auschwitz_audiobook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/143181a4-7942-4dbc-a219-2955f5def62a/17354009313.pdfIn PDF document text
    • https://s3.amazonaws.com/polojuliragam/search_google_maps_utm_coordinates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc2998a5-33f8-450b-9490-cc12dc79b895/kolam.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_off0000f1b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B9 5184 bytes
SHA-256: 0b55c98b23af6a640a11db05ecbad632ae93710022f5be54a635c8ff5459a753
font_01_sfnt_off00010339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10339 10600 bytes
SHA-256: d08d3dbe5f51209ff967f4117553fc05257ec6ac40a384efa3a7524a36a7d25e
font_02_sfnt_off00012766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12766 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361