Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ffca322f81b6a68…

MALICIOUS

PDF

104.6 KB Created: 2021-06-28 04:52:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8c2b0fd38f1346bdb4aa6ff6184e666f SHA-1: 0f0adb01f07ba2c726137920ccd04cab123a0a24 SHA-256: 2ffca322f81b6a686a7b2549c7033e41bdea2332d4a54f69e58a08bd3c0707fd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised websites, suggesting it's part of a phishing or malware distribution campaign. The PDF structure and link farm indicate it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9773

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=highly+satisfied+synonym
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/gkj0fk5iv47t07bb4jb4vcpf5h/govelum.pdf
    • https://www.varishastalari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070547bc278b---wafafeba.pdf
    • http://casaatlantida.com/userfiles/file///79940379777.pdf
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/29f192bef84b73d8bd8aadc346571d63/491239567.pdf
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608be2bb95583---97984527882.pdf
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/45b296228dea40dc132e0edf67aec5c0/papibinavikenutitonaneb.pdf
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/1c2804de5addfeef04e042d709ff4a22/45347807365.pdf
    • http://aimic.com/userfiles/file/66777596101.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608580b28c359---16355269065.pdf
    • https://siangyun.com/upfiles/editor/files/rizokodisu.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/e137c14172eb8887695bc47bd691114e/dizivogovefugiveg.pdf
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16071fb6fa6d6a---bufid.pdf
    • http://phs1961.com/clients/2/29/29da8dc1278d8f1c58a3d16208bcb4e7/File/xowuligaj.pdf
    • http://shsclassof1959.com/clients/a/a7/a7a82b2a6025f7fafce5d77be70bf845/File/71666261262.pdf
    • http://tcurryproperties.com/konadnew/userfiles/file/65953825922.pdf
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/h6p5n88p3ucro4h06cgp0pfe39/52054848371.pdf
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/918737cdcc2f16b2475db9e5c6fe17c6/baporadofur.pdf
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a574b041dab---79132922075.pdf
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/2as6idpd8ghruissrq0failr64/34828245035.pdf
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/06609ffa067d8d710dd26be0269109fc/86231443422.pdf
    • https://yuss.it/file/vipigodevolujinikafoxedu.pdf
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607246df25d88---96380741535.pdf
    • http://tfh-filter.hu/_user/file/22741339689.pdf
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/5b3992d2386aa88c8804a74ea3558899/jitibowidalibag.pdf
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/07a300bae6820fb3812ea3aa12d083f9/jekunejasenavezorisut.pdf
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/11l4qm0doff6m18vi041stm0cd/miwobi.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca7ba2ebfd---xuzalur.pdf
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/mb53246m4m3mla5aaqhsj2qpeg/97651807347.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000132e2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132E2 16792 bytes
font_01_sfnt_off00014af4.bin
d01b0eaef4310b3655a0ecd26c6a1d7f3a2d8cb5485908510b1b4c839d4a5f7e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14AF4 18248 bytes
font_02_sfnt_off00017ae5.bin
a08e19ecfe3203fb7f1aaff0bb35381da5d652c53ad40fb0410ba8049109fb61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17AE5 10804 bytes

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