Malicious PDF — malware analysis report

Static analysis result for SHA-256 87cbee874aec9101…

MALICIOUS

PDF

82.0 KB Created: 2021-03-18 09:04:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 02f27966689fdb74568bfafe85dd34c0 SHA-1: 5f0b7ccbdc2ed8d7db68694ae52f83ddcaac236f SHA-256: 87cbee874aec910126ea77fb03cb8183376154bfba45d4b59a12a91dce681c3b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 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://vilenefex.ru/wix?keyword=apps+evozi+com+apk+downloader PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372373/normal_601750c20fb09.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450439/normal_5ff5aa3393bc8.pdfIn PDF document text
    • https://xaxafojub.weebly.com/uploads/1/3/0/7/130738676/4052ecaeba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456687/normal_600f4be468986.pdfIn PDF document text
    • https://cdn.sqhk.co/topazawu/bHIjoge/hattrick_movie_all_mp3_song_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379605/normal_5ff8fe1e8f9f0.pdfIn PDF document text
    • https://sabijodamibig.weebly.com/uploads/1/3/0/7/130775907/gofobagikazegapud.pdfIn PDF document text
    • https://tajamexuzoxobug.weebly.com/uploads/1/3/1/4/131410736/7853449.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376611/normal_6023e8369e2b4.pdfIn PDF document text
    • https://cdn.sqhk.co/tenalewi/Rkhghaj/tomb_raider_movie_2001_trailer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366063/normal_600b5bfd03444.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/wizidimawag/boruruk.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/bhoot_fm_30_august_2019.pdfIn PDF document text
    • https://c84d532c-3b33-47d6-96aa-4134a1164eb1.filesusr.com/ugd/6d45f6_6c6ebad5c3d94827a26c117e4456b445.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/how_to_change_from_grams_to_ounces_on_polder_scale.pdfIn PDF document text
    • https://ffb80149-315c-4936-8637-e87477b606fc.filesusr.com/ugd/e7410d_48ad200e5fcd42dfa1d026d2090a9e5c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/59474255882.pdfIn PDF document text
    • https://67dc9804-4028-4298-afd7-d431d2c16fe6.filesusr.com/ugd/559c84_4ca0a07a9a5c428d8b492a642d794321.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC9 5476 bytes
SHA-256: cb58409b37179d3dac5ff0560d3ec37b90b4d4cbf40ab8330f10132995da19b8
font_01_sfnt_off0000ff6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF6E 10492 bytes
SHA-256: 1ecfcdc7119115848fe9f8f2e47b86b60c12ed6bc5ab953d6caddc4514b3730a
font_02_sfnt_off00012380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12380 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

Open this report in the interactive analyzer, or submit your own file for analysis.