Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d6786f03ae3b4b9…

MALICIOUS

PDF

71.1 KB Created: 2021-06-27 22:32:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e30756a6bb32593c035163a1283c74f1 SHA-1: 5651255061c5dd93caba3f8e70b1eb93d00923a8 SHA-256: 4d6786f03ae3b4b959b45de51ab2f1dd89fa6388b40322cb2c0d5156e0a0808a
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size and image-heavy content, typical of a screenshot designed to trick users into clicking. It contains numerous links pointing to compromised WordPress sites, suggesting a link farm used to distribute malicious content or redirect to phishing pages. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate malicious intent, likely involving the download or redirection to a secondary malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 71 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609acdaf7c38b---40223219882.pdf
    • https://mdteam.se/ckfinder/userfiles/files/novijebuvi.pdf
    • https://morethancleaningservices.com/wp-content/plugins/super-forms/uploads/php/files/b483aca3b5fa263198bd13c4833fca12/83518499538.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608ddb622dc8c---6054610030.pdf
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/179e8c84c5d09e35d688e80191e63070/95045033323.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/b10533afa32b837c88a007381adca1e0/rowutojekogelixakudigoz.pdf
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/hb38ljnd6ign6od4fd4tbv2nt2/32792779011.pdf
    • http://jump360.co/upload/files/20210609203433.pdf
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/f852c13f7f763e07b8259f254605a01f/11391943630.pdf
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/223ammalsd67ds7krgic8doe94/84057849292.pdf
    • http://arci-mp.fr/admin/File/1859691170.pdf
    • https://chaplains-camps.org/upload_picture/file/jadalejegoni.pdf
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f143ba0dac---35455780640.pdf
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4bebc6e0bb---xanumotexuza.pdf
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc83e4e95b---90780201208.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2cab69562a---jotilutimemoxelopowuv.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16085735452562---bimeveropiwipawuv.pdf
    • https://kaptenhoki.info/contents//files/gemabizexasid.pdf
    • http://baaningdoi.com/file_media/file_image/file/jolejotefifoxoluloravuvo.pdf
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8f98722c8---36805977831.pdf
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/51916436f1f71b1d00b2f3e7e9c41dbc/67695183756.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=telugu+forced+stories
    • 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_off0000bb75.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBB75 16792 bytes
font_01_sfnt_off0000d387.bin
0a68b936bd2ec9d5caf523d8056dc8a3632daa10a6745e599b192e787bf40523
pdf-font-stream PDF embedded font (sfnt) at offset 0xD387 13796 bytes
font_02_sfnt_off0000f52e.bin
9ef7ad1e0bd6dab000d3a69928b45fed63f6249f606c41a00868973b5066d017
pdf-font-stream PDF embedded font (sfnt) at offset 0xF52E 10448 bytes