Malicious PDF — malware analysis report

Static analysis result for SHA-256 90263f281d7468de…

MALICIOUS

PDF

97.8 KB Created: 2021-03-21 05:42:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 68042a6d36cd4af0d1f4d9e34bfbfebc SHA-1: a08d4d1827c98390e7063086a7ad8cbe9cf921e6 SHA-256: 90263f281d7468de58f6758606a0de103b4afa39dfee674bc96ebc611b4e913e
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious and phishing-related. It contains a large number of external links, many of which are to unknown or potentially malicious domains, suggesting a link farm or phishing attempt. The document body, though heavily obfuscated, appears to be related to a 'Whirlpool duet sport repair manual', a common lure for technical support scams or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://jumiwimov.ru/strik?utm_term=whirlpool+duet+sport+repair+manual PDF link annotation
    • http://zijaditenup.getenjoyment.net/vuxetirosok.pdfIn PDF document text
    • http://glasshookahcatering.com/how_much_is_100_denarii_worthtczri.pdfIn PDF document text
    • http://pifedalune.medianewsonline.com/tratamiento_de_ascaris_lumbricoides.pdfIn PDF document text
    • http://sozaxesugoj.mywebcommunity.org/kegutujoligewibexa.pdfIn PDF document text
    • http://gamowenugeg.sportsontheweb.net/71966067587.pdfIn PDF document text
    • http://kernig.pro/john_deere_240_series_2_skid_steer_specsny5t9.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://71da2aa5-51c3-4f2c-ab18-08bbbad20131.filesusr.com/ugd/d216cb_09e5a75ebfbf4b52817e6bb197dd11c5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/patilawasu/how_to_reset_kidde_co_detector.pdfIn PDF document text
    • https://ed21222e-fee3-4fab-8b52-e2ddb7bb35ab.filesusr.com/ugd/e73fea_4f1992a9f1144741999906b7eaea5918.pdf?index=trueIn PDF document text
    • https://e20d271a-53e3-41f9-9180-d6cd5f9fd148.filesusr.com/ugd/6cfc61_e888b50d816f40f4be898c1f38d424f5.pdf?index=trueIn PDF document text
    • http://sazebufaz.atwebpages.com/dowajativ.pdfIn PDF document text
    • http://lawaxisagiwog.atwebpages.com/sap_erp_tutorial_for_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/niporofez/hyderabad_chatal_band_dj_naa_song.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/dofopapovemap.pdfIn PDF document text
    • http://wuwedilejom.myartsonline.com/what_does_guerrilla_warfare_mean_in_social_studies.pdfIn PDF document text
    • https://s3.amazonaws.com/girilifawuxi/wovujeza.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/school_the_story_of_american_public_education_documentary.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/sukisafiduwiz.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/12818724240.pdfIn PDF document text
    • https://s3.amazonaws.com/veledabejufi/zipareravofub.pdfIn PDF document text
    • https://b56e00ce-d729-42e9-814b-b9a4b194f5ba.filesusr.com/ugd/f6f93f_1f08e842703d403998e4dada641ced0d.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000120be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120BE 1724 bytes
SHA-256: 1af1fdb02f150e4b7fb9ab825036f356033ef8d1f6adfeb519aebbff9637efeb
font_01_sfnt_off0001294a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1294A 5212 bytes
SHA-256: deabe5ec08d8a1423adf5c33d3b8f9dd27e995d5550adec78ab90d7f32d0755b
font_02_sfnt_off00013ae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AE1 12524 bytes
SHA-256: 962961360d1061f0dc602ff433cf980b314203799a09b4ffa46f09a6e25e5d52
font_03_sfnt_off00016489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16489 16060 bytes
SHA-256: 2173a1880e9f774f759393e7d0d28dda91d04d8a3eae6bea41b822770b343b90

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