Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e6e0e6aec78db21…

MALICIOUS

PDF

79.2 KB Created: 2021-04-16 23:44:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3bb39141b7d7752af22cdeefbd856252 SHA-1: 58c49997488c0bb98b49dc316594b87d7560c5e3 SHA-256: 6e6e0e6aec78db21ede426bf5aa16248d382ddfe1ea2fa3e1816fd3757649bdc
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The presence of a URL with a 'utm_term' parameter indicates a potential phishing lure related to a 'repair center app'. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xajibur.ru/strik?utm_term=mitchell+repair+center+app PDF link annotation
    • https://jagalanir.weebly.com/uploads/1/3/1/0/131071056/4872362.pdfIn PDF document text
    • https://cdn.sqhk.co/gixejefi/chjpl5S/xedaxiwapiwajilage.pdfIn PDF document text
    • https://cdn.sqhk.co/suwapipejob/ehbbh6T/1701550769.pdfIn PDF document text
    • https://relotevifinedu.weebly.com/uploads/1/3/2/6/132683264/738e43a71.pdfIn PDF document text
    • https://cdn.sqhk.co/wanukawuwota/ijyZxhf/2295884312.pdfIn PDF document text
    • https://todurudivi.weebly.com/uploads/1/3/4/3/134344361/5ebdc2.pdfIn PDF document text
    • https://fobijolosa.weebly.com/uploads/1/3/4/7/134730704/digidigijegise.pdfIn PDF document text
    • https://kewegiru.weebly.com/uploads/1/3/1/4/131438086/dijebupudo.pdfIn PDF document text
    • https://gopelema.weebly.com/uploads/1/3/4/3/134314553/8282337.pdfIn PDF document text
    • https://vefapabawi.weebly.com/uploads/1/3/0/7/130740427/wexumezez.pdfIn PDF document text
    • http://cancandance.org/vitamix_blender_amazon_prime51q3f.pdfIn PDF document text
    • https://galidenik.weebly.com/uploads/1/3/1/8/131856819/673b39dd104e924.pdfIn PDF document text
    • https://luvatuxi.weebly.com/uploads/1/3/4/3/134321506/ledujavuxo.pdfIn PDF document text
    • https://butiriretife.weebly.com/uploads/1/3/2/6/132681404/tabebowolodaxowepij.pdfIn PDF document text
    • https://cdn.sqhk.co/vamosopon/8bjhKMG/dopuwi.pdfIn PDF document text
    • https://cdn.sqhk.co/vifamepupib/gcMUrpz/lepuniwexipuro.pdfIn PDF document text
    • http://jusapp.club/936373019485wqsl.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/8c0d86c9-d3b8-41bb-bd06-e8820883acdc/raypak_rp2100_circuit_board.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/beduv.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/nezunijipewudazawalob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cd8324a-2dfc-4f9c-9425-ff0bab362f71/danasokomumumi.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/adobe_acrobat_pro_dc_google_drive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73dc8070-a4fb-46f7-8dac-5d790da95e7f/11521917920.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2b51fbb-1449-4ae9-8abd-adb521999820/36876225507.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_off0000f664.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF664 4848 bytes
SHA-256: dea0496042c4e91d66e54e7c7131a5890012fcc91b53515d83227aea3eb4bdb2
font_01_sfnt_off000106e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E6 12056 bytes
SHA-256: 8ffeab2f546e41f2171d8a656c9010be16b81c1b13d8ab3ebba4b5162497a4e0