Malicious PDF — malware analysis report

Static analysis result for SHA-256 928e30028107cb3e…

MALICIOUS

PDF

82.7 KB Created: 2021-03-28 20:19:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c35bbaff0862964a82b94a58754eb442 SHA-1: a9b3cc52480b2a259aae1888501ef808c88672f1 SHA-256: 928e30028107cb3e6b45a474fe611cb1e64ff9849629ef43913b603cd54b56f1
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, flagged as a link farm, and one suspicious URL pointing tobaarspo.ru. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and external links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://baarspo.ru/123?utm_term=best+scholarship+application+letter+pdf PDF link annotation
    • https://nenilinuda.weebly.com/uploads/1/3/1/3/131383514/0ec60a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387419/normal_5ff59f19aae63.pdfIn PDF document text
    • https://mirijanonukuzo.weebly.com/uploads/1/3/2/7/132740352/zusekizina.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374699/normal_6054df0eee4c1.pdfIn PDF document text
    • https://popuvagilubasi.weebly.com/uploads/1/3/4/0/134018524/8162131.pdfIn PDF document text
    • http://xemifizodagavub.22web.org/tennessee_titans_schedule.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412899/normal_5fe20adb03c1b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://835a0401-7144-467e-aacc-710587930ffc.filesusr.com/ugd/432cba_2f606c5b3d194680b3a013082cdc3a36.pdf?index=trueIn PDF document text
    • https://dc383e6d-b7a3-4e67-a88a-227fa542b6c3.filesusr.com/ugd/72b0e7_f2305864b5dd430dadc10cac409d78e2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/dogadoxoxutanegekepifelot.pdfIn PDF document text
    • http://lamuvija.epizy.com/25814191804.pdfIn PDF document text
    • https://e2604e0b-f95a-4acb-b53f-a7db3827b2a1.filesusr.com/ugd/225520_5b5b8033231e46189ebae743d1ee093b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zusevamasor/calculating_opportunity_cost_worksheet.pdfIn PDF document text
    • http://pepajefosub.epizy.com/free_intro_template_kinemaster.pdfIn PDF document text
    • http://gokubamo.epizy.com/spotify_apk_android_8._0.pdfIn PDF document text
    • http://gikutixutawax.epizy.com/roxewofuvekinuwam.pdfIn PDF document text
    • https://a121017b-3fb3-450c-9156-48dd71a9bf80.filesusr.com/ugd/07625c_3a05b365ef1c405ab210678ef9fd883f.pdf?index=trueIn PDF document text
    • http://munekekenagixo.rf.gd/gedebif.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/polygons_angles_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/ovulation_calculator_app_for_iphone.pdfIn PDF document text
    • http://wazuvolixevafo.rf.gd/29607074088.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/55867213363.pdfIn PDF document text
    • http://parakotevetit.epizy.com/legal_awareness_book.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_off0001061e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1061E 5292 bytes
SHA-256: 01db4883bda3e7d64bef291ba2f64abde4077a7a0a53c09937b57dbc6de591d6
font_01_sfnt_off0001181e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1181E 11324 bytes
SHA-256: a7a46bb63bd0426cc95b70e171be29a9ce3a24bd35b14f22a93b054cc980685a

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