Malicious PDF — malware analysis report

Static analysis result for SHA-256 c10fde4827b64388…

MALICIOUS

PDF

88.5 KB Created: 2021-03-16 10:25:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 1abfaf6aae06b9b88ff3d12cfcaf162e SHA-1: 86e67c3a78dce186e9fefa5aedc7a5fa5e432f2c SHA-256: c10fde4827b6438880726eb9ea4c1df7eba5a9c35011fd339a1104dee11eeb31
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous external URLs, many of which are hosted on disposable domains, suggesting a link farm or redirection mechanism. The document body, though heavily obfuscated, contains a title related to satellites, which is likely a lure to disguise the malicious intent of directing users to potentially harmful websites.

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://nipisod.ru/strik?utm_term=what+are+the+4+types+of+satellites PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4419642/normal_603e3b893757c.pdfIn PDF document text
    • http://alcozerox.com/is_sony_rx10_iv_worth_it1t88l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462696/normal_5fd1835eb91c0.pdfIn PDF document text
    • http://shopwithsale.website/a5_envelope_size_guidedchdj.pdfIn PDF document text
    • http://cetop.xyz/gelaxoeyw5r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416928/normal_5ffb77f47bd07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471971/normal_603cae5be3e02.pdfIn PDF document text
    • http://metiwizonud.getenjoyment.net/tabipixemofaxurow.pdfIn PDF document text
    • http://gukiduwonaxinef.getenjoyment.net/12956743689.pdfIn PDF document text
    • http://ganedoxumizaj.sportsontheweb.net/ps4_manually_eject_disc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502236/normal_600837dfc27dc.pdfIn PDF document text
    • http://gemubanabugawa.mypressonline.com/gebanefuku.pdfIn PDF document text
    • http://pinerapidsrr.com/xufadoxabuloguxesufo15vdg.pdfIn PDF document text
    • http://pusovemolexed.scienceontheweb.net/troy_bilt_lawn_mower_blades.pdfIn PDF document text
    • http://bilkan.fun/vox_tonelab_st_vs_les5l4l.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lopakesuzuw.atwebpages.com/laromes.pdfIn PDF document text
    • https://86b7bb9a-6a0b-496c-a062-e8aa60c365d0.filesusr.com/ugd/dcf311_9dbf62dde47a41d2a2cfa24904407e7a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/keragaman_budaya_indonesia.pdfIn PDF document text
    • https://s3.amazonaws.com/rabewiruzitewa/black_sesame_ice_cream_recipe_condensed_milk.pdfIn PDF document text
    • https://a44a9d9e-3ce9-422e-9b5d-83ef2d4925cb.filesusr.com/ugd/3234e9_459efd13b66b49acb1fda1009757a1a4.pdf?index=trueIn PDF document text
    • http://nixomirorubu.myartsonline.com/juzututujadisareji.pdfIn PDF document text
    • https://s3.amazonaws.com/wunupalezozerud/steel_bar_cutter_manual.pdfIn PDF document text
    • https://67bb8873-ca08-4da4-87c0-60a8072ebff6.filesusr.com/ugd/a838c0_d9b990c8f4614cf98f0053fb99c83171.pdf?index=trueIn PDF document text
    • https://9ebe8999-295a-4f11-87dc-c96f3e1b46ff.filesusr.com/ugd/8de238_679c990f99bd40559cec94a69d040da7.pdf?index=trueIn 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_off00011df5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DF5 5192 bytes
SHA-256: 141a5c587f255ee0c40b4ec4f8d92598f2524676b96f10834d20bc4282b03c79
font_01_sfnt_off00012fb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FB5 10736 bytes
SHA-256: e7bf644e65d3b0495afda8cb9eefc3823f949acf4b39019c20675a8dc84a690e

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