Malicious PDF — malware analysis report

Static analysis result for SHA-256 6de450bc46ebd4b4…

MALICIOUS

PDF

107.6 KB Created: 2021-07-23 13:14:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e619023d40333ff0b6f4a14ae713905f SHA-1: 49b2b32e00f13b51753de347110ea4046202b27f SHA-256: 6de450bc46ebd4b404fe1b378c98cd3b8f93beb2925fa5fb4a1cd08786653d51
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of numerous unknown URLs indicates a broad distribution or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://skvacations.com/userfiles/file/jivefububu.pdf
    • http://jkphotocon.org/data/userfiles/files/86787021806.pdf
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/67374481728.pdf
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/52355d4d88f911b7ec9d5e082fe24e3d/lafavivexiwutafegemure.pdf
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/9763b75e20da0ec0f1563b9e3a0b934c/27396492857.pdf
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/99dac630b89d8d37244d666bf0ea1c92/27511298743.pdf
    • http://gagutp.com/sa_upload/userfiles/file/20210605015604.pdf
    • https://partner-support.net/user_data/userfiles/files/22463912813.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607de83ab0c39---50217796443.pdf
    • https://aawyx.com/sites/default/imageuser/file/pasirijoji.pdf
    • https://sieuthimayphat.com/ckfinder/userfiles/files/20400010102.pdf
    • https://educhina.mn/editor/files/timawiwapegamagibapul.pdf
    • http://mp-hd.de/data/aktualnosci_imgs/file/gurudebosavopovavox.pdf
    • http://forumcutuca.com/ckfinder/userfiles/files/6912829155.pdf
    • https://alakharia.com/public_html/userfiles/file/50103647670.pdf
    • http://asude.istanbul/ck_images/files/49927496476.pdf
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/a1ab5ceb0c89d278da6688bd6281df09/kisogaxosafadefokitupa.pdf
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/4fec1ceaf61bfc7424a0263da04cb20b/84639219816.pdf
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/b323271bd4c073a294596b37a7a30414/tedebovuxokulupujawadud.pdf
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d294318f5f---bivozanax.pdf
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a7bbf77309f---wajuw.pdf
    • http://lurome7071.com/clients/e/ec/ec9741bbacd2a64db66b94b03f3cd24d/File/1957521782.pdf
    • https://coonvalleycc.com/userfiles/file/ziduber.pdf
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/msfllsouomlbmsp4kmu2g9r10d/xizegigiruxevumuje.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=one+kilogram+force+equals+to
    • 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_off0001391c.bin
b430820e2eea0a8c71a0fd6729653650871d5d93b4aad41bb421b47ff075304d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1391C 11040 bytes
font_01_sfnt_off0001528e.bin
d1f34e54a065862164b040045589810d45d74fdd65b5a35a38d6157e3015972a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1528E 20800 bytes
font_02_sfnt_off00018843.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x18843 16792 bytes