Malicious PDF — malware analysis report

Static analysis result for SHA-256 afd7787e51f624f8…

MALICIOUS

PDF

78.0 KB Created: 2021-05-13 22:02:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 65de7631163a4c9cbec1d6760e7cc299 SHA-1: 26d74b3ade40ccdeb663df97da9accbd0e297ab2 SHA-256: afd7787e51f624f822223271aa4118090b1eccff0c1ca12a60cb6004c8473961
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant portion pointing to disposable hosting and acting as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs suggests an attempt to redirect the user to malicious content, potentially leveraging a spearphishing attachment vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://resalured.ru/strik?utm_term=hush+hush+lyrics+the+band+camino PDF link annotation
    • http://ziduruwekomowob.iblogger.org/80054155326.pdfIn PDF document text
    • http://remont-pc.website/356074206558ia6d.pdfIn PDF document text
    • http://basagutidabe.sportsontheweb.net/modekiro.pdfIn PDF document text
    • http://formverifiedbadge.com/man_u_arsenal_highlightrniyc.pdfIn PDF document text
    • http://kanshoper.site/71966950508gash8.pdfIn PDF document text
    • http://migerov.xyz/jojebe7gqu9.pdfIn PDF document text
    • http://pifowovumuwe.medianewsonline.com/animal_cell_and_plant_cell_parts_and_functions.pdfIn PDF document text
    • http://persequenteamsohbet.com/80369167688nir1h.pdfIn PDF document text
    • http://buytoday.cc/gowomofekonewotojesoxo0wp9a.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
    • http://rodedewezijore.atwebpages.com/37860623007.pdfIn PDF document text
    • https://5e73d190-47a4-4ead-99bf-7e9069f06a16.filesusr.com/ugd/55cc32_523a4ff4cba84f93ab6f45b129c6f7f4.pdf?index=trueIn PDF document text
    • http://famekuputoda.myartsonline.com/33396867618.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4aa17cf1-1516-447b-b215-ebd93d5a5ec4/pokemon_show_leaks_reddit.pdfIn PDF document text
    • http://binaxasomeroxat.epizy.com/avira_free_antivirus_2020_windows_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86af0fa9-5dc1-43bb-ab10-416b2ca0916c/apc_br1000g_f02_error.pdfIn PDF document text
    • http://namakanexir.atwebpages.com/arabian_nights_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6af01602-235a-4641-af52-0d516c5091b4/feleposawosereresetujepud.pdfIn PDF document text
    • https://3f740848-0e57-4b51-8596-564812021bec.filesusr.com/ugd/cbe17c_1c1c9d33a4de45fbbe8e88098353c10c.pdf?index=trueIn PDF document text
    • https://0ea1ff7f-05b3-43a2-9744-178351a05ed1.filesusr.com/ugd/01f9b9_fd4a8cd07d9c4d4b886530c9a63216ef.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c654e566-1992-45b1-b1f4-83984e2680b9/didubabelemosuko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc1313dd-06f4-424e-b228-d95afe8b81d9/81146830880.pdfIn PDF document text
    • http://jenizigigeno.epizy.com/plague_inc_black_death_guide.pdfIn PDF document text
    • https://29159626-56e2-4eb2-a8c1-eb081f451e44.filesusr.com/ugd/a58502_818e4669041e4a3395976f4b658c1b41.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4AE 5264 bytes
SHA-256: 4e05ec31f6528bd55246ef84b58823121369f098dfb180381ed65308d97d231a
font_01_sfnt_off0000f657.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF657 10588 bytes
SHA-256: 71afe12b221642b12a40093401f7e8a8fb4895ac4f86d74d54f675818c0f5180
font_02_sfnt_off00011aaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AAA 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f