Malicious PDF — malware analysis report

Static analysis result for SHA-256 957428ae4c139a09…

MALICIOUS

PDF

81.5 KB Created: 2021-03-16 04:31:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5f81e4a758aa4c6d86353e6ade7592f4 SHA-1: 1237764c4e4d4ccfab6e6f37661eac9a2d758d2e SHA-256: 957428ae4c139a09b0cfffcc5e37ce3cdc14986d28373763074f522ade2600c6
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/strik?utm_term=python+3.4+tutorial+pdf+download+in+tamil PDF link annotation
    • http://litvinenko.xyz/vukimopugenfq09.pdfIn PDF document text
    • http://peskomment.ru/597856562307gbb3.pdfIn PDF document text
    • http://crubr.space/soundhound_for_pcdcnf9.pdfIn PDF document text
    • http://creditstar-kabinet.com/39091207816eps0c.pdfIn PDF document text
    • http://igcopyrightverify.com/vororuwijukadomewanintfj6b.pdfIn PDF document text
    • http://goladelexugezi.sportsontheweb.net/95364693513.pdfIn PDF document text
    • http://biomaniks.website/helicopter_sim_flight_simulator_air_cavalry_pilot_apke780r.pdfIn PDF document text
    • http://redpandarecycling.com/938498333v5koi.pdfIn PDF document text
    • http://jixazepo.mywebcommunity.org/traxxas_tqi_transmitter_reset.pdfIn PDF document text
    • http://beststudent.space/house_of_lies_download0b2dr.pdfIn PDF document text
    • http://fullhp.info/gran_turismo_6_cheats_ps307v9p.pdfIn PDF document text
    • http://reliables.ru/husqvarna_chainsaw_455_rancher_carburetort2bjq.pdfIn PDF document text
    • http://fosukimiten.22web.org/due_date_for_revised_tax_audit_report.pdfIn PDF document text
    • http://checkmyscore.info/pirubefoxuzilakizmnix8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8c56b32b-3398-45d6-9c0b-b55146621f16.filesusr.com/ugd/6924eb_ca4c44a39c4f4718a4397d68f766c6ad.pdf?index=trueIn PDF document text
    • https://0a3c8164-ddd9-4522-8472-457ce31ece15.filesusr.com/ugd/d32f78_7dd2f02c92224674a88bc3290bdb0276.pdf?index=trueIn PDF document text
    • http://juropap.rf.gd/pavixeverisapezomuwo.pdfIn PDF document text
    • http://wurunuj.epizy.com/kugapubovebinukij.pdfIn PDF document text
    • https://c0771fee-1ba5-4dbf-bba5-a775c3d44c03.filesusr.com/ugd/544e7e_505d526a1c5d4ae9a10862ff7aae88a1.pdf?index=trueIn PDF document text
    • http://kamigawox.atwebpages.com/after_effects_cs5_tutorials.pdfIn PDF document text
    • https://1cdd1dcb-54a5-4750-95ad-c4cce9a68cd1.filesusr.com/ugd/1e32c2_b120087cdd724991834193241a8fe4c7.pdf?index=trueIn PDF document text
    • http://maxumuvekem.epizy.com/36996040157.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001005f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1005F 5580 bytes
SHA-256: e16a63a26a80fb5bc7621867c4b0a7000eb7f524a5c507c86d4c5c9def7dc36e
font_01_sfnt_off0001135f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1135F 10928 bytes
SHA-256: e3aa13f684bfc36c9505f569b2d3d959aac97ca7e6b25a5e8b70c834630595ed

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