Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2c334cff28e198c…

MALICIOUS

PDF

82.1 KB Created: 2021-09-02 23:22:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 81287e35c421d0144ad3f07ba9d517b9 SHA-1: e42c07a93f9c5938c2833d1a0ef6874ebb2a7c37 SHA-256: c2c334cff28e198cba6e1b8860294b12df357f64a54ec975200d2f76d8f2c137
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to various domains, including those hosted on compromised WordPress sites. The presence of 'utm_term' parameters suggests an attempt to track user engagement, common in phishing or spam campaigns. No scripts were extracted, but the overall structure points to a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://archism.ru/uplcv?utm_term=particle+physics+phenomenology+pdf PDF link annotation
    • http://sugarfree-gelato.com/upload/file/difopus.pdfIn PDF document text
    • http://7m-shop.com/userfiles/file/26848536560.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c785abcf81---rusizozozazaxejoredodim.pdfIn PDF document text
    • http://somersetcountybar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/24959845809.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/27uf5rc29qsipt8ebb4bem4c76/kowodalujogewusomotelefo.pdfIn PDF document text
    • http://chafewyuok.handysociality.com/upload/files/dedifis.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612c92005f6d0---42844760155.pdfIn PDF document text
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16107a7ff975c1---wofupaxomeb.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/2af8884f4a855cb517eca3c3a315a7cf/tikube.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/s0rs0ce314mfs0hv46c7s6tuvu/96251899917.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/nuxud.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/299f22b02c2329412fcee0a82ac642ca/bujinutazetixesulal.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/d45f42b5596bc20243b4d28230cbabb5/99538424219.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1c9038ef9---53794824688.pdfIn PDF document text
    • http://storemisr.com/uploads/files/48346439372.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/6230cbf5cb6f2321b11bcf014a99429e/mupedurifatokaveluso.pdfIn PDF document text
    • https://www.koreayokogawa.com/ckfinder/userfiles/files/49103939618.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a92dd0cdae---nevimilozugajolovowuwawa.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075b7dec41b6---50895470864.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160966be169c41---dozusamizogufolin.pdfIn PDF document text
    • http://doubles301.jp/files/ckeditor/files/nufipenolavajidevakosisi.pdfIn PDF document text
    • http://asvpp.fr/pdf/13343821829.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609e671177786---1282260521.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/86d28d7c4aa8a2ca4ed52d4294f8576f/95922183582.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2EF 11184 bytes
SHA-256: 6e521e7b29dc9ec6648d6d811cd97d8414678dafc4a2367a63bdb3799e3d981e
font_01_sfnt_off0000ecb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB2 1860 bytes
SHA-256: 562d39cc93351683f3420870a5578826c1285db13c691c08f99be18f4980e560
font_02_sfnt_off0000f564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF564 17376 bytes
SHA-256: aedc9a74fb47eeb2385b0ec535f6ca6cd93290bf0d1731c31d3f8df51ca73de1
font_03_sfnt_off00012263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12263 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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