Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bf50cfd9b1eb156…

MALICIOUS

PDF

78.2 KB Created: 2021-08-09 22:11:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 913bff87bdd6db3388881c13cd5ecbe3 SHA-1: 3deab9bffa5fbbb61b6de47f1cc6315f60e141f3 SHA-256: 2bf50cfd9b1eb1565b26ec75632dc226d9b547ea526b80d45aa68e1c1b93d96a
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as 'Pdf.Phishing.Trojan'. It contains numerous external URIs and links to compromised websites, suggesting a phishing or malware distribution campaign. The presence of embedded URLs indicates an attempt to redirect the user to malicious content, likely to harvest credentials or deliver further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://allytemp.ru/uplcv?utm_term=percy+jackson+lightning+thief+audiobook+download PDF link annotation
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/egdrvporhdspbev3coa2d5q8hq/zixut.pdfIn PDF document text
    • http://womenshealthcarenp.com/clients/2/29/29a32d4da59f0b4eaa4573e1354aeabc/File/kalemikuvareravu.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/n7o9catidd60o6f19bl245itld/karudeboxedelelodexoxiv.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/v94ckc6hr5vtfkmkkoch49j6e1/sejolasikef.pdfIn PDF document text
    • http://digifast.cz/userfiles/gajolawinoxaxagip.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/5co5a21n0l1k23ko2ch1t3jho5/36654107506.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b20334b591c---vufuvazoxewaka.pdfIn PDF document text
    • http://sushiosushi.com/uploads/files/damusisuvegogo.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160db903dde5df---fevurofatekorozotepu.pdfIn PDF document text
    • https://creativitagh.com/pevron/www/img/file/91677678566.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/1607467b8cc0d8---93552071854.pdfIn PDF document text
    • http://stylekd.ru/files/sokikisepizubeb.pdfIn PDF document text
    • https://otelnamore.com/wp-content/plugins/super-forms/uploads/php/files/cfba9f93859c756d76cb32eb8a0ed214/garoxojaz.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c00adb21421---soloxeja.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f1c546c65f7---dijenagijidoko.pdfIn PDF document text
    • https://binarbaidtrading.com/public_html/userfiles/file/wobowezuma.pdfIn PDF document text
    • https://europacreativaeuskadi.eu/files/galeria/files/vorutidepiwinotuwiwep.pdfIn PDF document text
    • https://www.ftha.org/admin/ckfinder/userfiles/files/61734822373.pdfIn PDF document text
    • http://studiogiovannone.com/userfiles/files/ganidogotamunoki.pdfIn PDF document text
    • http://garantc.ru/userfiles/file/93326174780.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/38874364397.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_off0000c8e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8E0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e0f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F2 17808 bytes
SHA-256: 6eef3556017cfcfb83aec790a712a7f7cba61ec3a9154a4568a3199287f69dc5
font_02_sfnt_off00010ea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA9 11416 bytes
SHA-256: 55782f3684b4e056d9135d893af483c6d989648380fe512178804c307a835bfd

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