Malicious PDF — malware analysis report

Static analysis result for SHA-256 174ddbb51ad34fe3…

MALICIOUS

PDF

76.9 KB Created: 2021-03-15 21:48:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 7b0b75a75e83c30cfc5f716b725b74ec SHA-1: 113e6b3200dd674e41f8544dfccbe8cf1bb68ee2 SHA-256: 174ddbb51ad34fe3622c71377f03a252fe0775b4b2ad1648a406080d0822eb35
126 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous external URLs, many hosted on disposable domains, suggesting a link farm or redirection mechanism to phishing or malware sites. The PDF structure and embedded URLs are consistent with a spearphishing attachment used to lure victims to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/award?keyword=a+catholic+introduction+to+the+bible+the+old+testament+pdf PDF link annotation
    • https://cdn.sqhk.co/nawafoxobok/JiUjdP8/general_hospital_spoilers_rumors_franco.pdfIn PDF document text
    • http://usesalle.xyz/gigasududibofajaliojeay.pdfIn PDF document text
    • http://fullhp.info/virepelujimugigapizolev618ow.pdfIn PDF document text
    • https://cdn.sqhk.co/pajijolabalu/djihage/93218310771.pdfIn PDF document text
    • http://jirenaxapibetig.scienceontheweb.net/dental_anatomy_colouring_book.pdfIn PDF document text
    • https://cdn.sqhk.co/gavezexu/ZheR1ib/41422454864.pdfIn PDF document text
    • http://xasedogamif.mypressonline.com/pedusojalobodegiluzepas.pdfIn PDF document text
    • http://prizinsta365.online/twilight_eclipse_free_movie_download8l27d.pdfIn PDF document text
    • https://cdn.sqhk.co/xawodoze/bjfiajd/popowafufimaxol.pdfIn PDF document text
    • https://cdn.sqhk.co/vedukosamo/mSjhjeZ/piano_notes_chart_songs.pdfIn PDF document text
    • http://raxawevamavox.getenjoyment.net/63645760767.pdfIn PDF document text
    • http://mon-compte-cmb.best/71539086538xjkzx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://0f926834-650c-4d5a-b53c-ad60ae412ccc.filesusr.com/ugd/6a44d8_1b131aa5c86044da984bae3c639b6a96.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dofufiri/blackberry_link_bb_q5.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatesawodiji/free_printable_count_and_color_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/i_capuleti_e_i_montecchi.pdfIn PDF document text
    • https://s3.amazonaws.com/tobojelusiwi/salojawamasufovoxatufubus.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/how_to_take_apart_top_paw_folding_crate.pdfIn PDF document text
    • https://34ec465e-51aa-4dba-9a8c-c05fcfb5ae84.filesusr.com/ugd/df15ee_548e247e8b77415e9cda6c379d9d99c8.pdf?index=trueIn PDF document text
    • http://resilasijajatil.myartsonline.com/american_gods_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/50462951536.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_off0000ed37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED37 5524 bytes
SHA-256: c5ae47e34da4dcbce103149a58ec92cf9aae247ce4ea533aa84af94056d6e7ad
font_01_sfnt_off0000ffcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCF 11248 bytes
SHA-256: 6bbbea31cd889c7d64e9e811b2d07bf31d58ceac481d5e12dff988e1a33d756c

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