Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab6e76c74b8bfb47…

MALICIOUS

PDF

80.1 KB Created: 2021-04-15 22:42:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 328b4c544b9d63c73caff1bd1e26a0a8 SHA-1: 9a56280429e93b943d57e6ee25087a9248dc7bff SHA-256: ab6e76c74b8bfb47910c9f883d7bbeffbdc25557f39eff3b9253b11f0da944a4
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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://dugedepap.ru/strik?utm_term=matilda+roald+dahl+book+summary PDF link annotation
    • http://mixumawetogufik.22web.org/mogukuko.pdfIn PDF document text
    • https://cdn.sqhk.co/solijisivono/Qgdheih/17852047343.pdfIn PDF document text
    • http://leopolds.space/how_to_program_rca_rcr3273r_3-device_universal_remote_control8v2uq.pdfIn PDF document text
    • https://cdn.sqhk.co/tavaxikanabu/goThbia/3375081105.pdfIn PDF document text
    • https://cdn.sqhk.co/zofizitene/hOuiggg/sarosobaladetofegurilen.pdfIn PDF document text
    • https://cdn.sqhk.co/kosenopelid/Jhejh2s/10567491262.pdfIn PDF document text
    • http://jizawilezi.22web.org/how_do_you_put_on_the_full_armor_of_god.pdfIn PDF document text
    • http://insurancecarusa.com/how_to_purge_big_buddy_heaterl2che.pdfIn PDF document text
    • https://cdn.sqhk.co/lalivaga/jhgdYhh/boberize.pdfIn PDF document text
    • https://cdn.sqhk.co/xujuvotu/abdhip0/archipelago_lightroom_presets_free_download.pdfIn PDF document text
    • http://axecheat8.xyz/charge_dipole_interaction3lb55.pdfIn PDF document text
    • https://cdn.sqhk.co/zezetemirag/tgd9fCI/70770309261.pdfIn PDF document text
    • https://cdn.sqhk.co/dederubap/d5gehfJ/ultimate_vpn_free_internet.pdfIn PDF document text
    • http://sodalabs.club/tuwid3cot7.pdfIn PDF document text
    • https://cdn.sqhk.co/fowoleleda/jB6gdYJ/16701289747.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jizunija.epizy.com/pomavadolitonad.pdfIn PDF document text
    • http://dasudigakufise.rf.gd/software_development_company_usa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb989f27-92e5-4dac-97bf-66e491ed6ccb/what_does_whetto_mean_in_spanish.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/668e2ea0-3afd-4e77-ac05-42b6493980f8/goruzulodegaviwo.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/machine_learning_for_finance_in_python_datacamp_github.pdfIn PDF document text
    • http://riserurilipel.rf.gd/xutosaridutasorepikap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbee88ea-2ff5-47ab-9b07-b7d13d9c4b22/citizen_eco_drive_watches_mens.pdfIn PDF document text
    • https://s3.amazonaws.com/tutasujal/unscramble_words_worksheet_for_grade_1.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/92608467522.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/mokegigerawexolizi.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_off0000fd9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9B 5376 bytes
SHA-256: 973e148b613c495ccf892b217eef13522bcf446c29bab3d6186d256f26da48d5
font_01_sfnt_off00010fc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC2 10260 bytes
SHA-256: b12c1f929770e0152cf746869c9eb0d951f68461e9982ba1853f9e8611762d10

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