Malicious PDF — malware analysis report

Static analysis result for SHA-256 606c2a7efea2f367…

MALICIOUS

PDF

87.6 KB Created: 2021-06-28 18:51:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e7654098dee71ba92febec6583943e3c SHA-1: 404a56d167b57346027fb3f49ac10a9ea940671c SHA-256: 606c2a7efea2f367fcb2baf30dde7a33450b3017176bf3c9951410954c9a77f6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

This PDF was flagged by a machine learning classifier and ClamAV as malicious, indicating it is likely a phishing or trojan delivery mechanism. The file contains numerous links, many pointing to compromised websites, and heuristics indicate it functions as a link farm and presents a fake download button. While no scripts were explicitly extracted, the presence of external links and the overall structure suggest an attempt to redirect the user to malicious content or initiate a download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://aftaplan.com/works/peepsparty/html/upload_files/file/43592046341.pdf
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/29bc96ec9fca38581a865b761e0ee1fa/43521638552.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1608fdb321195d---96655910622.pdf
    • http://alexanderkanevskyartgallery.com/clientMedia/file/bukideziti.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/39299045044.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a548958c0db---sevuwegagapebekewuna.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160a00831c3ea8---82593811546.pdf
    • http://www.anieliasfx.com/uploads/textareas/file/wigawezerazukiku.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ca64bb6d0---96829032947.pdf
    • http://nextgt.eu/uploads/file/fotukuxuvi.pdf
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608d2d86de812---75566558561.pdf
    • http://www.alex-vasilkov.ru/images/wisdom/file/sogasigutisuvab.pdf
    • http://vitacanes.com/uploads/files/4882461954.pdf
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c9693dcb45d---31569842163.pdf
    • http://scales-center.com/shop/fck_file/file/75350240752.pdf
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8f4d7c5d5c---12760124053.pdf
    • http://cukierniabrzezinski.pl/www/artizam/fck/file/kasasela.pdf
    • https://calldidocta.com/wp-content/plugins/super-forms/uploads/php/files/d7a790c293c7a51e2fff6f0ecd20989e/2313374329.pdf
    • http://www.kymkarajok.net/tiedostot/files/guxiz.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/452e20fb6128d873a876512a6d4d624c/ritarebez.pdf
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/0489puptga6kl0pv3bt35hkssv/13680572438.pdf
    • http://pelesiuvalymas.lt/i/File/69668647638.pdf
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2893a14b53---kudolovisutewid.pdf
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/e52da2f989375532d53eb48fe42ad09e/34899026757.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160802ea741298---rolinepaditowojobivek.pdf
    • https://limsurempat.com/contents//files/50851808022.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=any+pdf+to+dwg+converter+crack
    • 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_off0000e819.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE819 16792 bytes
font_01_sfnt_off00010030.bin
310ccf55e199d42e07fe004165cb2db674106bd23f266c0e2ba742bb4bc8e55b
pdf-font-stream PDF embedded font (sfnt) at offset 0x10030 10828 bytes
font_02_sfnt_off0001193c.bin
61cb3ca2de0258a329a1dfdaf41325f3373f9c36a3ce128f89d635e5aaaae5e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x1193C 27096 bytes