Malicious PDF — malware analysis report

Static analysis result for SHA-256 52abcc37d9dc1b16…

MALICIOUS

PDF

79.9 KB Created: 2021-03-23 12:29:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 68996af739f1d92e884753c87d9d5f76 SHA-1: eb8bcd519e9e176e4ab9103290cf490c1044b5af SHA-256: 52abcc37d9dc1b16edea3efe3762b58e4e881920c4b5c13527e5340b41595946
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a deliberate attempt to create a deceptive web presence. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing unwanted software, as indicated by the URL containing 'gta+san+mod+apk+cleo'. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://maypoin.ru/wix?keyword=gta+san+mod+apk+cleo PDF link annotation
    • https://kuvitoguke.weebly.com/uploads/1/3/0/8/130813837/9ee5a9caeb.pdfIn PDF document text
    • http://gekenig.mywebcommunity.org/safas.pdfIn PDF document text
    • https://nusutaligufobam.weebly.com/uploads/1/3/5/3/135393176/soxofar-witolenorulem-wisolugibada.pdfIn PDF document text
    • http://zafikapasipugog.medianewsonline.com/business_communication_skills_download.pdfIn PDF document text
    • http://bikelumonekodex.mygamesonline.org/3238502764.pdfIn PDF document text
    • http://fijubigatusurov.scienceontheweb.net/16207496906.pdfIn PDF document text
    • http://pinegobojefo.getenjoyment.net/49801819943.pdfIn PDF document text
    • https://garegijewavib.weebly.com/uploads/1/3/4/3/134389285/gonefexugilad_lumawexezowu.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/69cb1f74-5e35-44a6-bb9f-256b39ace342/how_to_make_coffee_gaggia_classic.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/68495728098.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d65d1e2b-0490-44dd-ac0b-a6c4d9ba5dbf/21074112588.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d76fd9d0-5d93-46d4-9a4e-bf3348911ced/zafono.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/174e9897-d07c-4a1b-85e0-1afdfc0feffe/11161347281.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bf551a2-e774-408f-b4b2-47e8dd0e89f8/how_to_double_crochet_magic_ring.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfbd89d8-a45f-465e-b43b-89c92471ca19/59919141632.pdfIn PDF document text
    • https://s3.amazonaws.com/zozofufulolig/solving_multi_step_equations_worksheet_7th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/posawizuliwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb519935-5e67-4c1e-bfe0-484d9267244c/samsung_tv_customer_care_number_in_pondicherry.pdfIn PDF document text
    • http://jibimom.myartsonline.com/53189967449.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/what_is_momo_in_trading.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/villawood_east_public_school_uniform.pdfIn PDF document text
    • http://koradanizepagow.myartsonline.com/autocad_architecture_3d_tutorial.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_off0000ecd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD2 5220 bytes
SHA-256: b7f8bd22e413d5997cfc575dcf0e75e3fc138ecc01716e2528832f3e51cf757f
font_01_sfnt_off0000fe8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8E 22812 bytes
SHA-256: b98694e42939189b43cdf834f5bba4dd5e7e181be64ffceef28732b40dcc8acb

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