Malicious PDF — malware analysis report

Static analysis result for SHA-256 09139266c531648a…

MALICIOUS

PDF

79.3 KB Created: 2021-03-13 23:59:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8c296907b3b6f35ccaed886fe326b33e SHA-1: 74e6a431664e646617518a5745a1057f79498dd6 SHA-256: 09139266c531648aba5279dfb24bb69e6a684bc1d3753af07d769b3097c30c20
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, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary URLs, 'https://lozipotod.ru/award?keyword=yaseen+shareef+pdf', is directly embedded and likely serves as a lure. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF. While no scripts were explicitly extracted, the structure suggests it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://lozipotod.ru/award?keyword=yaseen+shareef+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419642/normal_6026a4ff46e8e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380680/normal_60296186c978e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379611/normal_5ff48919be786.pdfIn PDF document text
    • http://tawivafewak.22web.org/profiles_in_courage.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/883802a6-317a-4567-a13b-664f97499403/what_car_seats_are_compatible_with_baby_trend_sit_and_stand_stroller.pdfIn PDF document text
    • http://kegonen.rf.gd/rem_end_of_the_world_lyrics_chords.pdfIn PDF document text
    • https://s3.amazonaws.com/fovezewi/74722803236.pdfIn PDF document text
    • https://s3.amazonaws.com/tigewibejageju/garmin_gpsmap_60csx_marine_maps.pdfIn PDF document text
    • https://78fa80b2-8629-447b-ad63-53e91e8d4948.filesusr.com/ugd/8f02de_c743e0e79d474875b345b8f0ad07cd72.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/gupinixurutopufujowe.pdfIn PDF document text
    • https://6f8cb219-4830-455d-9ced-b55e65700e85.filesusr.com/ugd/fd30ac_4f0eb61ef4164e758bf595832e8b4748.pdf?index=trueIn PDF document text
    • http://reduxaxu.epizy.com/arms_around_you_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7aab38ef-a8c0-4710-9c5b-e3dbfcc045b6/muboponagitupivepun.pdfIn PDF document text
    • http://godutiliwaganos.rf.gd/litany_of_humility_prayer_catholic.pdfIn PDF document text
    • https://s3.amazonaws.com/betefowubevat/isildur_no_meme_template.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_off0000f8c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C8 5056 bytes
SHA-256: 814af9c912a7be42cca9e80da23f85e70ef49966c7b7f4c3aec310aec0a4ba2d
font_01_sfnt_off000109f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109F4 10860 bytes
SHA-256: a469f65a8b8cc9ab493f813e59998d0d6fff5a5dab4fc14caca7748d13020b43

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