Malicious PDF — malware analysis report

Static analysis result for SHA-256 adaa44d41734f9d2…

MALICIOUS

PDF

284.1 KB Created: 2021-06-28 08:17:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 565b428d098fca8aa2212ab0a5997cad SHA-1: fc78e7f71c6e314e2cc0b16951135e1fd1fb6f1e SHA-256: adaa44d41734f9d2e5970369e1e10393e6e344fbe71f9c20eba2e0324dd77afc
166 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. The heuristics show it contains links to compromised WordPress sites, suggesting an attempt to trick users into downloading further malicious content. No scripts were extracted, but the presence of external links points to a downloader pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9744

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • 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://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b97dacd584---25940544599.pdf
    • http://artospace.com/pics/file/vodedisotonozem.pdf
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff12c471f1---xubivazezuluxipinegekugik.pdf
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160715d1ea526e---28693763663.pdf
    • http://myucmas.com/userfiles/file/19795802354.pdf
    • https://mymango.ru/wp-content/plugins/super-forms/uploads/php/files/39e87090d51f1d74d529f562caab7fca/gipefusope.pdf
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c545f3e2928423c38d9badb6a46cd2f2/dilam.pdf
    • http://nguyenthaotech.com/upload/files/58724648106.pdf
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/eb1176d2b889ec0610c2777d021a3455/dilas.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607228c2c9651---34323388297.pdf
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/a7a86dccdf80c4a04cd5b487f916ab91/58199742263.pdf
    • https://hondamienbac.vn/userfiles/file/wizugegutex.pdf
    • http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/160769fc552add---milukafuzalijebomefirurid.pdf
    • https://unique-u.biz/images/uploads/file/pokujujuke.pdf
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/8484565251f8fe532e8f86823650670b/gukepitumobisuxor.pdf
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca347d6dd6---tagojipufebosuvanidisaxi.pdf
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d56ef7a54f0---zavazajewa.pdf
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/db10fh54drabrruieh1sv9nrbp/23139384316.pdf
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/dvahfm4dchmki86lsh2vho0bkc/33389202787.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160adedf22f051---27578561450.pdf
    • https://silverlabpupsforsale.com/userfiles/files/wuvodosek.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/blsku5pn66pa13g3jku70n0psn/95586031006.pdf
    • https://almoheetmanpower.com/public_html/userfiles/file/92451454120.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=academy+sports+and+outdoors+stock+symbol
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off000436c3.bin
a5ebe809971bcedea2a923b6e82d3fbb5f33359a251f30c88a69f5072398d22c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x436C3 24560 bytes
font_00_sfnt_off0003bde1.bin
c1f405ceae89bedf9ee52bdf78645b50ff26ee0438b2ccc67239792a6df92c61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3BDE1 29160 bytes
font_01_sfnt_off0004053e.bin
4d508905ef0fcf80bb15931a2a6887bb8fd04b9500488e5fcc41f97083d9247f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4053E 11008 bytes
font_02_sfnt_off00041eb2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x41EB2 16792 bytes

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