Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c82850b5a893216…

MALICIOUS

PDF

75.7 KB Created: 2021-03-29 18:43:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5be96c75b51e79c4b52eca3afcd11f81 SHA-1: 8ff70c5cdb6cd9991af9857a62aaaeca7621a09a SHA-256: 6c82850b5a8932165df512850fa18f82d0f0577d1aedd24e8afefff2b22ae5ac
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://baarspo.ru/wix?keyword=antena+tv+apk+2020 PDF link annotation
    • http://misstourist.info/crosman_repeatair_1077_scope3b8ad.pdfIn PDF document text
    • http://meblik.su/telecaster_guitar_plansbw7tn.pdfIn PDF document text
    • http://jakartapro.xyz/the_childrens_book_of_questions_and_answersggfvs.pdfIn PDF document text
    • http://vnatural.space/all_animals_photos_hdviibv.pdfIn PDF document text
    • http://itclick.pro/kalegovitonaxikadejek6bfk5.pdfIn PDF document text
    • http://dombitarf.ru/buvedodadosj3p.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/saziwijaxodav/jaxesutewisuwakonitote.pdfIn PDF document text
    • https://3350d16e-2476-487b-844f-3942c02081ad.filesusr.com/ugd/25270e_f8bb10355371410e8e4110a71e9dafef.pdf?index=trueIn PDF document text
    • https://b3d988c2-7a7d-4c3c-9141-221b6550481e.filesusr.com/ugd/9dda13_6216aeb27e4847c7aa1c55b98e175060.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/punagilelabon/vadawotelaviwaba.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/98904845934.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efe303ba-868a-4407-aea8-a275a4e40832/45267985347.pdfIn PDF document text
    • https://952d9f4b-853a-4e85-af28-23c4d489d487.filesusr.com/ugd/8db125_5fefad458a604c68b445f658c65ead38.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9f5bd96-9d70-4458-a5ad-30e951e6781e/how_exchange_currency_works.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/thank_you_maam.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/63261069523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7a6d913-2a9e-457b-a1ed-97b9f287e181/personal_statement_for_university_examples_chemistry.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_off0000eb39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB39 4896 bytes
SHA-256: a88f5d025b304f4864b5b21088aefabf71f3aeacb04dd174ad3b40c6106e65c8
font_01_sfnt_off0000fc03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC03 11528 bytes
SHA-256: 68ab81da118a27ed450096e18c214d4276ae0dfddedbe747fe43dda77909e985

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