Malicious PDF — malware analysis report

Static analysis result for SHA-256 136cadd10449922c…

MALICIOUS

PDF

74.8 KB Created: 2021-03-17 21:43:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 722702e46d407d82c2ef2a2f9082efb0 SHA-1: 8beda8ac893b0de43bdd7ebc8700c8a2e6275c71 SHA-256: 136cadd10449922c9d813e33dc228bb6eef888b0d7e1008351a1122ba9035819
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a critical heuristic identifying it as a link farm designed to direct users to external sites. One prominent URL, 'https://dugedepap.ru/award?keyword=relation+between+measurement+assessment+and+evaluation+pdf', is flagged as suspicious and likely leads to a phishing or malware distribution site. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing lure.

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://dugedepap.ru/award?keyword=relation+between+measurement+assessment+and+evaluation+pdf PDF link annotation
    • http://nudabozijojoz.iblogger.org/93065784466.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://caf0f927-206f-4b4e-aa34-0dd3da53679b.filesusr.com/ugd/83d902_c2a6a8b90e0c418f9cc88e67469bc92b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/18117295143.pdfIn PDF document text
    • https://ef4b221f-cfb4-47e8-bf1d-3b5092770df7.filesusr.com/ugd/4948da_f719d6d09875451bba8fb7f34af7415d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/97185fa6-a11b-4ed1-87f4-a3cfdc2d9dcf/max_lucado_online_church_youtube.pdfIn PDF document text
    • https://30c74dc1-c3f2-4e71-8253-1ec84f3b94e1.filesusr.com/ugd/b8c6fa_62c56b086ce64d45b7c9ece3351d9c1f.pdf?index=trueIn PDF document text
    • https://ec679cc6-872a-45a8-b2fd-b1bc8f6ddb77.filesusr.com/ugd/d1d005_c33092ea1292423eb9638eeec734eb0e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jesidofefe/fowute.pdfIn PDF document text
    • http://tavuvije.epizy.com/sust_admission_2020_19.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1232cb05-6d22-4677-afe2-6fbfd493d757/kuriv.pdfIn PDF document text
    • https://40e214c1-1950-44e8-a195-e2c6eeb23253.filesusr.com/ugd/a517f4_e9fa5cc44e4240488d53a7ada6136cba.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sojebelevenex/perimeter_and_area_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb941185-a743-44f8-b091-20418c7120fe/42296513526.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4067341a-75b2-4b17-8dce-e53a7a8d01b3/clean_cuisinart_k_cup_coffee_maker.pdfIn PDF document text
    • https://fe2b84af-b373-48e0-a714-f820169e3fe9.filesusr.com/ugd/ed1d2e_ff35492ea6594d1ba125f5ceee36467c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fidobakipivogit/laforasimudavij.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/jofog.pdfIn PDF document text
    • https://a0bbd489-bf03-48a0-8e93-88abd0751e5b.filesusr.com/ugd/370ea2_8e9a78b9fc8941848255ebfcc93ddb4b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4d3219f9-e122-4a35-8dcd-16704afac820/deniwawugetutiv.pdfIn PDF document text
    • https://s3.amazonaws.com/dazifozixawus/my_talking_tom_app_for_pc.pdfIn PDF document text
    • https://75e6d08a-b14f-4c2c-bd4e-3e6431d9d11c.filesusr.com/ugd/497a87_e0b74c24fa0a4ca1aba743cd096ef466.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/total_amount_of_working_capital_balance_sheet.pdfIn PDF document text
    • http://sudiwoke.epizy.com/83948240709.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_off0000e60e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60E 5484 bytes
SHA-256: 1826c65259f5fe012806f39eebcd8fbb4aceaa4da88fc2138138839c03c5bfce
font_01_sfnt_off0000f8b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8B3 10744 bytes
SHA-256: 75c95f0d2de3eda4caf13b819824aa33e06e18bef8f57ebef182a5deb0d8805a

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