Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc725562e8fe088e…

MALICIOUS

PDF

77.0 KB Created: 2021-05-13 10:32:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 013a621a8f0ff4b2f14128510a09acc2 SHA-1: 6ce660e931b054072c3c1540dfd946ce02ff3709 SHA-256: cc725562e8fe088e1515f4bb6c3d211023d3e42c58dbfae44bbfa1c46300ce4d
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to numerous external URLs, one of which is `https://xezojetit.ru/strik?utm_term=are+teeter+hang+ups+good+for+you`. This pattern suggests the document is designed to lead users to potentially malicious sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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=are+teeter+hang+ups+good+for+you PDF link annotation
    • https://cdn.sqhk.co/womawuxinuge/SgjgSxV/voicemod_soundboard_tutorial.pdfIn PDF document text
    • https://fazukowabawubi.weebly.com/uploads/1/3/1/4/131407802/ligidu_zipirulakujoxij_dasuxomu_pufomukatabinen.pdfIn PDF document text
    • https://cdn.sqhk.co/wisewuguv/Jv3Dihi/kundli_software_for_mobile.pdfIn PDF document text
    • https://fumunavizagoz.weebly.com/uploads/1/3/4/2/134235019/9539247.pdfIn PDF document text
    • https://cdn.sqhk.co/sujubowip/hfmjebg/sonic_the_hedgehog_game.pdfIn PDF document text
    • https://cdn.sqhk.co/remonupode/ZbW4he2/malwarebytes_anti-_malware_new_version_free.pdfIn PDF document text
    • http://xozonline.ru/muzakaselusebulimepumekfdbqa.pdfIn PDF document text
    • https://cdn.sqhk.co/kujaruwajovi/gjjJiic/santorini_windmill_villas_greece.pdfIn PDF document text
    • http://topukovatawosu.sportsontheweb.net/34186162084.pdfIn PDF document text
    • http://instapresent.site/70339871405u02wk.pdfIn PDF document text
    • https://cdn.sqhk.co/verikiweneza/Ihejg4Z/jeniwewetevifani.pdfIn PDF document text
    • https://cdn.sqhk.co/telivagawu/gxjj2o6/87995440122.pdfIn PDF document text
    • http://dadevizevarek.scienceontheweb.net/how_to_program_cox_contour_remote_to_control_tv.pdfIn PDF document text
    • http://myyshooop224.site/32435641739mhd7d.pdfIn PDF document text
    • https://cdn.sqhk.co/nugegigoxaxe/ha2jhid/dafipotogelep.pdfIn PDF document text
    • https://cdn.sqhk.co/pasededi/ibhhIgg/paintology_draw_paint_socialized.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/054bf5c6-853f-4fa0-978e-9b8ce752e3e6/how_to_reset_your_verizon_router_password.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c30551e-94d4-4a39-ae98-d394480028be/the_collector_2_watch_online.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_off0000edfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDFE 5360 bytes
SHA-256: a415c66d0d6510605d34fba936d7ce20d8277b8a2888daa24c7937ed54a889c7
font_01_sfnt_off00010042.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10042 10776 bytes
SHA-256: 7fb8babdc1c4411907c6e5acc463e19bcf8973ca87159d21a747854f6f330471

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