Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7ca85194dc44577…

MALICIOUS

PDF

75.5 KB Created: 2021-03-08 04:49:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 0473c9be326651487ca633219aafa59d SHA-1: 042a3402dce73fc77dd4bd765132b7cc0eff0f45 SHA-256: f7ca85194dc44577372d6cb72b9f77fb258843cd26911e13dbe0720713b2892c
126 Risk Score

Malware Insights

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

The PDF document contains embedded URLs and heuristic detections indicate it is a link farm designed to redirect users to potentially malicious sites. The document body, though heavily obfuscated, contains text related to 'salvation army workers get paid', suggesting a phishing or scam lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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://jumiwimov.ru/strik?utm_term=do+the+salvation+army+workers+get+paid PDF link annotation
    • https://sowematawenuw.weebly.com/uploads/1/3/1/1/131164153/xuvixidu_mexataxuxi_vitugawoxoziz.pdfIn PDF document text
    • http://pimifawimonidij.mywebcommunity.org/different_types_of_country_musicians.pdfIn PDF document text
    • http://midikakuvekume.mywebcommunity.org/how_to_make_animation_storyboard.pdfIn PDF document text
    • https://pexekakuxop.weebly.com/uploads/1/3/2/8/132814074/sufefememurono.pdfIn PDF document text
    • https://gomarevijupa.weebly.com/uploads/1/3/4/5/134585171/8599187.pdfIn PDF document text
    • https://senemoribut.weebly.com/uploads/1/3/4/7/134703027/wumipug_jasare_pitusanibitap_vizire.pdfIn PDF document text
    • http://sumapewub.getenjoyment.net/muleteru.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sabuxixu.epizy.com/pidukakabozomukiw.pdfIn PDF document text
    • https://s3.amazonaws.com/jawusawar/best_psychology_books_uk.pdfIn PDF document text
    • http://jaxirelogalitis.epizy.com/calendario_2021_con_festivit.pdfIn PDF document text
    • http://jowokepo.atwebpages.com/my_lg_washing_machine_is_not_draining_water.pdfIn PDF document text
    • http://gurabagoderes.atwebpages.com/does_tegrity_record_your_screen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa33656a-8016-4aaf-b835-a02917b76256/7268927612.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/visejulupew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/428ddbb6-a944-4808-abe5-833b5bcb5e6c/dd_5e_ancient_white_dragon_stats.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/brightsign_xt1144_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05cc684a-179b-4cf0-8c51-7c2aa6a36cd9/pukomarodolobusiwupu.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/bapufig.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/explode_the_code_2_1_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_off0000e9ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AC 5688 bytes
SHA-256: 16097198d3dc2e069944e7c9aef50c07a97e4a90dab7f5c5fd27c119231845ac
font_01_sfnt_off0000fd00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD00 10720 bytes
SHA-256: d2ce3b1eb57ca4e4368becd070ca367445fca9d4a0809343b584fd36818193f0

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