Malicious PDF — malware analysis report

Static analysis result for SHA-256 15304f462520dde5…

MALICIOUS

PDF

84.2 KB Created: 2021-05-20 23:08:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 8ba6c1182a1a20a37b75f83faac62a59 SHA-1: 73c16dd001383f243f129b04fce1944c025ccc80 SHA-256: 15304f462520dde53d993e57dec4ce1f1f44371d5400cd1b0e06607d1a2e37b1
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to potentially malicious domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier and ClamAV also flagged this file as malicious. The primary malicious URL identified is https://jottigo.ru/strik?utm_term=radio+shack+metal+detector+63-3005+owners+manual, which is likely used to deliver a secondary payload or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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://jottigo.ru/strik?utm_term=radio+shack+metal+detector+63-3005+owners+manual PDF link annotation
    • https://valabokewem.weebly.com/uploads/1/3/5/3/135311070/b78cb.pdfIn PDF document text
    • https://wujezevo.weebly.com/uploads/1/3/0/8/130874127/muzunuzojodudexowok.pdfIn PDF document text
    • https://buxijoxusezo.weebly.com/uploads/1/3/1/4/131483018/5ae7a0e.pdfIn PDF document text
    • https://kebokezuzak.weebly.com/uploads/1/3/5/3/135318209/04dd2972d5505e.pdfIn PDF document text
    • https://bubokadorododu.weebly.com/uploads/1/3/4/7/134758236/db44feaa7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492915/normal_6013c373023ce.pdfIn PDF document text
    • https://muragifenujokuf.weebly.com/uploads/1/3/1/1/131164382/7159201.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409118/normal_5ffece334104c.pdfIn PDF document text
    • https://kewegiru.weebly.com/uploads/1/3/1/4/131438086/vitidonezafemewoza.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zidenigad/42049271957.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/padaverilukumusegu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a4ee34c-b2dc-469c-8e86-23b4cc7d5121/terimemokajuwotolizi.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/37915943195.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/489ec0c4-84da-45ae-b707-03456695bed1/the_unbearable_lightness_of_being_movie_watch_online.pdfIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/tigimodugofuzogaminug.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/ski_goggle_lenses_color_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/extreme_rapid_fat_loss_handbook.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/how_to_replace_2008_malibu_headlight.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/162859fa-9b2b-48b2-bacb-d6e4721597ed/flowermate_v5.0s_how_to_use.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/18744352446.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3cb82d21-0a46-4842-bcc1-db5d70de3dbb/how_to_factory_reset_kindle_d01100.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0889841-1de7-42f8-9c29-a049c7dcbf84/xewexusitazatugedob.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000107a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107A0 5956 bytes
SHA-256: 391a6a7088a2a98ec4cf92ab62bd84a56913abb754545c788545ee9ff648cee5
font_01_sfnt_off00011bd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BD6 12004 bytes
SHA-256: 527aa00263dc03e260a2ea858482aa0d725db0daec4f381b749e74e6aebbda72

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