Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad1f180e666f0059…

MALICIOUS

PDF

79.0 KB Created: 2021-04-11 20:31:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: deca30c02d7ab5901676a0737f694335 SHA-1: 5271e8eeb431b5965c80891eb919aa111b5c6939 SHA-256: ad1f180e666f00598fd3b0875a6337b621fba91819d9d1e84518b05466a3dab9
126 Risk Score

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 0.9997

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://soxebez.ru/strik?utm_term=how+to+read+a+poem+pdf PDF link annotation
    • http://shoppingyxplus.xyz/sizazimijugutukelowv949s.pdfIn PDF document text
    • https://wesuzimowigimeb.weebly.com/uploads/1/3/4/7/134745326/niluverapej.pdfIn PDF document text
    • https://wosowabo.weebly.com/uploads/1/3/4/3/134340570/cfa0563.pdfIn PDF document text
    • http://rexirututesopew.iblogger.org/kitefa.pdfIn PDF document text
    • http://cheapestshop.xyz/96312898625cvftv.pdfIn PDF document text
    • http://setavifisotater.22web.org/gugorupipotizixa.pdfIn PDF document text
    • http://jatulusejeb.iblogger.org/ingersoll_rand_2475f13gh_two-stage_gas_powered_air_compressor.pdfIn PDF document text
    • http://bobixuposu.22web.org/what_is_the_hidden_oracle_about.pdfIn PDF document text
    • http://mizizufiku.mywebcommunity.org/92035941681.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://ce55c564-0e79-48ac-bd91-a034cff8554b.filesusr.com/ugd/bd1fc0_84a9e2b30ebb4b5fb5ebfe6e8bfe62b3.pdf?index=trueIn PDF document text
    • http://fiwukum.rf.gd/vevamagofogavasuzoxibej.pdfIn PDF document text
    • http://zizenatoxu.myartsonline.com/48014873707.pdfIn PDF document text
    • http://tebafifara.rf.gd/85149290274.pdfIn PDF document text
    • https://9329dc78-1a6b-4cc7-98ac-1b36262b7dd5.filesusr.com/ugd/d2be55_db952cb341314adbb2763275be4599ae.pdf?index=trueIn PDF document text
    • http://wavexijazibivat.myartsonline.com/autogenic_drainage.pdfIn PDF document text
    • https://b00f38ea-0d13-4519-ab0f-1253f0d03ca0.filesusr.com/ugd/289c5e_30b1c15b162f42c8a175719dcc0b9d58.pdf?index=trueIn PDF document text
    • http://jojexapopexevof.epizy.com/convert_file_to_cdr_format_online.pdfIn PDF document text
    • http://ruxezila.epizy.com/68036174898.pdfIn PDF document text
    • http://megigezorozo.atwebpages.com/54317459275.pdfIn PDF document text
    • http://gudonuwoponiri.rf.gd/lufubomaf.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFE 4664 bytes
SHA-256: 140a43b8fd11b43d8c518aab7d1c400d14372e3c149974ce8e045551551a8581
font_01_sfnt_off0000fbe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE5 10904 bytes
SHA-256: bb2102e5730d78d908cb8e483e6877ea9f03b3a84ee7f65429579b52eb2de658
font_02_sfnt_off0001207a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1207A 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230