Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2ecc7bf8c250661…

MALICIOUS

PDF

83.0 KB Created: 2021-09-20 19:07:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8e2efa9ea12c22942c41c8481d9f8a55 SHA-1: c1cbe8127dea62e5091940b42e83ef0aa74b789b SHA-256: f2ecc7bf8c2506612ddbe59f8da94d78279067a6f75e54c5b42c62b2a917123f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous external URIs, including one with a 'pdf movie app' UTM term, suggests a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attack pattern involving redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://medvor.ru/uplcv?utm_term=pdf+movie+app PDF link annotation
    • http://superazs.ru/images/news/file/24782783084.pdfIn PDF document text
    • http://shopphutungmayphat.com/upload/img/files/tomurideguwoligoxixo.pdfIn PDF document text
    • https://lrsinc.co/userfiles/file/wumowezoku.pdfIn PDF document text
    • http://abwmarlboropike.com/uploads/files/movukumogum.pdfIn PDF document text
    • http://gespk.com/userfiles/file/nojeterotibabiruwewikuniv.pdfIn PDF document text
    • http://marinda.ru/pics/images/file/jutuzisudarojanexamen.pdfIn PDF document text
    • https://nstoplana.rs/ckfinder/userfiles/files/pigalelozegeledanivenuza.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16144804bd0035---milipisatogoxokonaxo.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/16147c68077872---36929675410.pdfIn PDF document text
    • http://adatarimhayvancilik.com/Images/Media/files/43319349042.pdfIn PDF document text
    • https://atkarisuli.hu/userfiles/file/58621811328.pdfIn PDF document text
    • https://francoisdaulte.com/ckfinder/userfiles/files/46633239318.pdfIn PDF document text
    • http://biancoacolori.it/userfiles/files/bezusoxefo.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/refudi.pdfIn PDF document text
    • http://tgroupsrl.com/userfiles/files/sopitanuve.pdfIn PDF document text
    • http://www.adarshvidhyasankul.org/userfilesfile/19010243323.pdfIn PDF document text
    • https://fablab808.com/nbloom/fckuploads/file/66164347044.pdfIn PDF document text
    • http://fornacedelia.it/userfiles/files/36683850923.pdfIn PDF document text
    • http://chipublichouse.com/ckfinder/userfiles/files/gerufurememokedimoxu.pdfIn PDF document text
    • http://epmresearch.org/userfiles/files/83420953496.pdfIn PDF document text
    • http://tion.hu/upload/file/lopogomulaw.pdfIn PDF document text
    • http://rapet.hu/files/febapenukak.pdfIn PDF document text
    • http://ttworld.hu/uploads/content_files/files/50832218131.pdfIn PDF document text
    • http://klick-tipp.info/ckfinder/userfiles/publics/files/79860109933.pdfIn PDF document text
    • http://s292376414.onlinehome.fr/datas/imgmail/file/80711999107.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE266 17340 bytes
SHA-256: 5f68bae934f6b2f1fd43068fd9fa8b19b32fed71b40c2ccd721b1e855fd9075a
font_01_sfnt_off00010f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12761 10212 bytes
SHA-256: e91adaa236409744a747eb15645c1b78e588efea3651f6f1016748080866cd9e

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