Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbe8e2af9afc7780…

MALICIOUS

PDF

77.3 KB Created: 2021-04-20 10:50:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 04008c5d039b7e0a4b2cc836e4a81e8a SHA-1: 281dd3e816cdd7fd717fb78c42f1f51433705189 SHA-256: bbe8e2af9afc77808f7764cd456a9279030a386247879d431a874bc68c30ab55
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan-like behavior. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic to direct users to malicious sites. The primary URL observed is 'https://xezojetit.ru/strik?utm_term=what+is+a+good+memory+foam+mattress+topper', which is likely part of a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xezojetit.ru/strik?utm_term=what+is+a+good+memory+foam+mattress+topper PDF link annotation
    • https://cdn.sqhk.co/nebuneduzib/1hehcoU/sifexovixexuvaga.pdfIn PDF document text
    • https://cdn.sqhk.co/gidagolusi/Tjbigcv/vr_hunter_game.pdfIn PDF document text
    • http://expo-kit.ru/what_kind_of_memory_card_does_a_garmin_gps_use7vxbx.pdfIn PDF document text
    • http://nibajafij.medianewsonline.com/44328170047.pdfIn PDF document text
    • https://cdn.sqhk.co/mepowokugo/ihhjBqs/maxisys_ms906bt_printer.pdfIn PDF document text
    • https://cdn.sqhk.co/vudupapuj/iEjfmDJ/water_slide_racing_fun_games.pdfIn PDF document text
    • http://nezowigivomi.scienceontheweb.net/tejavujov.pdfIn PDF document text
    • http://dikegebe.mygamesonline.org/how_to_improve_sat_reading_history.pdfIn PDF document text
    • https://cdn.sqhk.co/vujejanar/giigWge/gagumidenitebele.pdfIn PDF document text
    • https://cdn.sqhk.co/pugepavofu/jfx2jaa/xetutakuv.pdfIn PDF document text
    • http://raisinshq.pro/western_digital_my_cloud_sync_softwareqclcx.pdfIn PDF document text
    • https://cdn.sqhk.co/zafupusapun/XBjf6ZQ/ruziletiruvubeb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://palelezugob.onlinewebshop.net/airtel_bill_receipt.pdfIn PDF document text
    • https://2a983b51-2e13-4971-8c1f-a5bca3ab4353.filesusr.com/ugd/e1a791_3b495967c37d46a78612682b87ad393a.pdf?index=trueIn PDF document text
    • http://jatoxat.atwebpages.com/dictionary_english_spanish_download.pdfIn PDF document text
    • https://90b6428a-f85d-4fb4-90f7-6cca40d0dc23.filesusr.com/ugd/55544c_69eb9f525ee241a4bd0368809c798a98.pdf?index=trueIn PDF document text
    • https://023e3b0e-89aa-4e00-bd19-175c11a0a9c0.filesusr.com/ugd/5f4883_93dd6302e09546e2b0e6812218ba6701.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED45 5540 bytes
SHA-256: b3bd0128b3534c43852a153fc5424d688495f85f8c881d7ea1cc9bc97a7fdb48
font_01_sfnt_off00010005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10005 11240 bytes
SHA-256: 26c98fbc0d7bf97e6ef619f83463f42c82c7c16c4dfea08d76b5ad7db6183f14

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