Malicious PDF — malware analysis report

Static analysis result for SHA-256 a08e6869d29069f1…

MALICIOUS

PDF

76.8 KB Created: 2021-03-08 11:34:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 51cb3bcc9c750b53322acaeb7f6d0691 SHA-1: b235446de84d03d604d8af27d2d8102dba13837d SHA-256: a08e6869d29069f1ce497cd6b1de3b822663362d663a733349f2efb70aa75741
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, specifically as a phishing attempt. The document body, though heavily obfuscated, contains text related to a medical query, likely intended to trick the user into clicking the embedded malicious URL. The numerous external URIs and link farm indicators suggest a phishing campaign aiming to redirect users to potentially harmful sites.

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 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://baarspo.ru/strik?utm_term=que+significa+sentir+presion+en+el+pecho PDF link annotation
    • https://cdn.sqhk.co/wezopexa/ghfhchi/umc_pharmacy_lubbock_phone_number.pdfIn PDF document text
    • https://viwobatenujaneg.weebly.com/uploads/1/3/4/4/134444739/4da169a34986ac.pdfIn PDF document text
    • https://cdn.sqhk.co/wemorapi/7ajefhi/15462474482.pdfIn PDF document text
    • http://wegutamozeji.iblogger.org/16857774236.pdfIn PDF document text
    • https://cdn.sqhk.co/rejibebadit/icejhii/suxat.pdfIn PDF document text
    • https://metatigizedi.weebly.com/uploads/1/3/1/3/131398099/2483534.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493867/normal_602452f3c8c7a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483083/normal_5fc75053a56e8.pdfIn PDF document text
    • https://buliduxefexefux.weebly.com/uploads/1/3/1/6/131636978/9173090.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366340/normal_5fc693b136250.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427820/normal_5ff65da9d2d15.pdfIn PDF document text
    • https://cdn.sqhk.co/xovenekot/egcljcG/meteor_shower_august_2020_south_africa.pdfIn PDF document text
    • http://kiwalapisetovu.iblogger.org/how_to_get_sponsorship_to_work_in_canada.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/xukanomarexumu/book_thief_quotes_part_1.pdfIn PDF document text
    • http://farujage.epizy.com/article_critique_example_essay.pdfIn PDF document text
    • http://topufopotu.epizy.com/wesokagemajigojati.pdfIn PDF document text
    • https://1a6c606f-1efd-495f-9370-57f425d809fd.filesusr.com/ugd/1be480_ab5d4f946c2a4348836ff54d002b9b44.pdf?index=trueIn PDF document text
    • http://kibeboxonu.rf.gd/susixumonaposuvisosubuta.pdfIn PDF document text
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_51be2ffbc5184ac9bfd0171d7903cd67.pdf?index=trueIn PDF document text
    • https://57eba762-b826-4879-8d7a-7f480aba2934.filesusr.com/ugd/e89c2b_084f15d8ec9c49e985a5482f8a3e0626.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rumezo/what_are_the_similarities_between_greek_and_roman_theatre.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/fagodepefudipumukidofulu.pdfIn PDF document text
    • https://s3.amazonaws.com/dakebesuvum/literary_terms_in_romeo_and_juliet_act_2.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_off0000ecdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDF 5336 bytes
SHA-256: b929736495f8db775b9eee67b9ebc4e0f6b62b6867f5c97934cb229a227211a9
font_01_sfnt_off0000ff07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF07 11884 bytes
SHA-256: bc29a00d6beef677cd10e510e52083df666ce25b68b4e75f6b2d838c2bed8fcd