Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0ba284968444db3…

MALICIOUS

PDF

98.1 KB Created: 2021-03-08 14:34:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 3068ade3f85d53b837567158162d7182 SHA-1: b4589c8efacab233f8f27e1390e09fb66eaf2d7e SHA-256: a0ba284968444db345227ec491660b39b6f50be4b6a1ddb8157023b5b34b703a
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and link farms, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are characteristic of phishing lures designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://nipisod.ru/award?keyword=sociability+of+man+pdf PDF link annotation
    • http://befotuke.mywebcommunity.org/how_many_cubic_feet_is_an_apartment_size_fridge.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464078/normal_60170ce9f40cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486220/normal_5feb7f357793a.pdfIn PDF document text
    • http://makamar.tech/rovercraft_race_your_space_car_hack_apknpmrf.pdfIn PDF document text
    • http://submonster.xyz/ad_topology_diagrammery7ghq.pdfIn PDF document text
    • https://rusokakes.weebly.com/uploads/1/3/4/0/134016884/7742352.pdfIn PDF document text
    • http://wumiwuzigimo.mywebcommunity.org/how_to_connect_iphone_to_kenwood_car_stereo_bluetooth.pdfIn PDF document text
    • https://kafememum.weebly.com/uploads/1/3/4/6/134616831/fokib.pdfIn PDF document text
    • https://daxozeke.weebly.com/uploads/1/3/4/3/134322415/zavawozujujamu.pdfIn PDF document text
    • https://vukexelisijaka.weebly.com/uploads/1/3/1/0/131070195/2945042.pdfIn PDF document text
    • http://aov.one/81722770453j5w20.pdfIn PDF document text
    • http://lesuxofozadize.mygamesonline.org/the_antichrist_nietzsche_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450350/normal_5fec09267ada6.pdfIn PDF document text
    • http://ygrash.website/venosuzasigaxikvfhhk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409103/normal_5fcc029ea8da7.pdfIn PDF document text
    • http://vbnmcxz.xyz/jezixewizogozetobibi1hrzk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381762/normal_603b9348f2b3c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/dujepav/63651020110.pdfIn PDF document text
    • http://lanosebezazov.onlinewebshop.net/gas_scooter_repair_shop_near_me.pdfIn PDF document text
    • http://suxudogakol.myartsonline.com/zamutuwiwaxeditudikes.pdfIn PDF document text
    • https://s3.amazonaws.com/nitidadufetenu/sample_of_daily_accomplishment_report_for_ojt.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000136b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136B7 5044 bytes
SHA-256: 397256f1546760bcbf4bf6c6d9752ad5cfb4a1b16bde4d7a8b3c59b624cf9035
font_01_sfnt_off000147b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147B3 10452 bytes
SHA-256: 7b7b34accae4d18298c32ca20f768e2a57ac5c8bf0a56180189679f01fc75246
font_02_sfnt_off00016b53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16B53 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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