Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbb1703df3cde9b4…

MALICIOUS

PDF

102.3 KB Created: 2021-03-27 09:41:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 77fdf3ca58339ea7a35f45603344655f SHA-1: 26b750731dc0bdb72b2599ca88502f59eb107099 SHA-256: bbb1703df3cde9b42cb5f46c80b8dc4c11f370d53733deb6fbdb7f4ddd3f4d2c
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a primary external URI pointing to 'https://dugedepap.ru/award?keyword=angkor+archaeological+park+map+pdf'. Heuristics indicate this PDF is part of a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://dugedepap.ru/award?keyword=angkor+archaeological+park+map+pdf PDF link annotation
    • http://tapikival.22web.org/wewiraf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489056/normal_600a01e1532e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481406/normal_60513ee13fb78.pdfIn PDF document text
    • http://gunepevoxop.66ghz.com/pakistan_bait_ul_mal_scholarship_form_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446633/normal_5fda724142388.pdfIn PDF document text
    • http://tortomsk.ru/screen_recorder_pro_apk_iphonende9w.pdfIn PDF document text
    • http://lunamawel.22web.org/loan_repayment_statement_template.pdfIn PDF document text
    • http://copyrightshelpcenter.com/77127638047rsqef.pdfIn PDF document text
    • http://reawont.online/65713404604v3goi.pdfIn PDF document text
    • http://vedice.ru/26626048740srus7.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
    • http://rigatage.epizy.com/wefenejiwigabivinixugovon.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/fallout_4_dlc_companions.pdfIn PDF document text
    • https://8c805f22-5240-4a8e-9b4d-8499607ff1fc.filesusr.com/ugd/76156b_96e9c9d241e94848b21b9c999c8ff3b8.pdf?index=trueIn PDF document text
    • http://vugugoma.rf.gd/should_graduate_school_be_capitalized.pdfIn PDF document text
    • https://71347f20-8353-4153-bebc-dd2a28b3a5cf.filesusr.com/ugd/a382ee_f5b429acd7994818894b567ae8ff5999.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gaxuremewuger/tezomas.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/lenovo_thinkcentre_m820z_aio_10sc002gmg.pdfIn PDF document text
    • https://s3.amazonaws.com/loneminovu/vogubopi.pdfIn PDF document text
    • http://bifezuragumizi.rf.gd/70443675869.pdfIn PDF document text
    • https://f3215690-35ba-4bce-915f-db1a6f912a1b.filesusr.com/ugd/d32599_0ab1bafd5b5349bab32e0280a9ace47e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/56874919046.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_off000145fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145FB 5152 bytes
SHA-256: aec3fdd1ac0ef9ce904bbbee5a7c84f955a2249f1d2fa9a71d1930a16f801dbe
font_01_sfnt_off00015746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15746 11336 bytes
SHA-256: a986fd90be295f80c689fa6a7c44db744c71468341453e10db5b2c0f942b44cc
font_02_sfnt_off00017df1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17DF1 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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