Malicious PDF — malware analysis report

Static analysis result for SHA-256 2847c73eb6f53a19…

MALICIOUS

PDF

88.8 KB Created: 2020-11-24 09:16:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: a8f67d0d246a0a030209cc987b4a98e4 SHA-1: d29909d341751a728e556e7e26a76db518ea43a0 SHA-256: 2847c73eb6f53a190d88284ea7eda58c841ddb6883a178ea805c42a30040f3c2
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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffnew.ru/strik?utm_term=el+pais+de+las+pulgas+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427544/normal_5fb935e5b5b25.pdfIn PDF document text
    • https://pimetagedipimop.weebly.com/uploads/1/3/1/6/131636886/sanamosux.pdfIn PDF document text
    • https://jepopiravu.weebly.com/uploads/1/3/4/1/134131497/2a828.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410222/normal_5f9a0a5140f57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454677/normal_5fbc11f94d7dd.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/divikufifir/command_and_conquer_generals_pc_game.pdfIn PDF document text
    • https://s3.amazonaws.com/digigitusuduk/25683072750.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/hydrocosamine_sulfate_dosage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87903aa7-374d-4f90-9bdc-29ca2ee7f07f/megolire.pdfIn PDF document text
    • https://s3.amazonaws.com/jijari/nirumimatumumoze.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/beethoven_sonata_17_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/damavalapazef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7b61c7b-5fc5-48b9-a2b6-9c7b83560019/jbl_gx602_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/024a62c2-1879-445d-a1e9-878009daaaff/10954434593.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1da2a4b5-8e9b-4abb-8ffd-a34effdbca50/13698106771.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/429b7d27-dab5-45f5-92b4-096a4b801d4a/83719871826.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/fraction_to_decimal_practice_worksheet.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCF 5068 bytes
SHA-256: f1e2bf3c066d32c6627c1096ee037459f9aa55a72f2d6abfd6aa5df1791a3519
font_01_sfnt_off00010d20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D20 1796 bytes
SHA-256: 68bbe42c93759ab90c218695aa25c1747b40456063d11b0ac06b51d2514fd3e6
font_02_sfnt_off000115ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115AB 12388 bytes
SHA-256: eb76ad0a0ed99d13c7dbb8accc781f6aba07893729549da040f099cd4a9b0a1e
font_03_sfnt_off00013e3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E3A 16312 bytes
SHA-256: 531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660

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