Malicious PDF — malware analysis report

Static analysis result for SHA-256 306782d79f704a46…

MALICIOUS

PDF

88.2 KB Created: 2021-07-22 20:09:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cad000fdffb17264a442b40d111ea33f SHA-1: 0a07ed18a5d4a6d06c988988ec7d9525d6cacba7 SHA-256: 306782d79f704a460708c5af89533fd7d4fc8e2bca9ddbdb5f800678074f171b
196 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the embedded links are the primary attack vector, likely leading to further malicious content or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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.
  • 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.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085f11415f4d---zifavemulososibufogu.pdf
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/fvglbaftrsa5o58v0qquj577nn/jifubimodegozitogaduf.pdf
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/e20d008fe1c5d318e58c52b09df29b1b/46139531359.pdf
    • https://remoteworkerclub.com/wp-content/plugins/super-forms/uploads/php/files/5363192d91937ff45a300b77152ffa2c/galozevadegile.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607361fcf19c9---51009941106.pdf
    • https://premiumvipbusiness.com/wp-content/plugins/super-forms/uploads/php/files/2848974617fb93991e5bef67cd03ee39/nixazufapibidoziv.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/6c517e60329b21d998e82e8b49bbfecc/53817997486.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160efeb42414e1---kopalujitagoba.pdf
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1606d86e964c58---39174350407.pdf
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160755076334f2---lukujawax.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096fef4ed44b---maweguzewadafijijam.pdf
    • http://xn--l3cbpp3gh4a5g5c.com/userfiles/files/35120754251.pdf
    • http://dh-cell.com/ckfinder/userfiles/files/xusezivavipuwasux.pdf
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/8e9c2eb7e90df85ed6a2f8819e65fea5/54557669687.pdf
    • https://kmkmekanik.com/upload/ckfinder/files/jevapuguj.pdf
    • https://mednet.mk/public_html/upload/userfiles/file/98001423442.pdf
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a70af826242---82494696332.pdf
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/6638b6f7e6a191830d06abf86dbec651/7589750232.pdf
    • https://www.jahnigterbraak.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160775d84dfd3b---16563445290.pdf
    • http://veterinarioassociatopacinidallatorre.eu/userfiles/files/bigelikiludowixake.pdf
    • http://curtisfamilyfun.net/clients/e/e0/e02f67ab5b6879a7eb6c21a3163f7106/File/96528044737.pdf
    • http://akkoryazilim.com/userfiles/file/78168523441.pdf
    • https://rosedreamholidayhomes.com/ckfinder/userfiles/files/jewumifun.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f372114b9---67716127447.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=evangelize+china+fellowship
    • 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_off0000f413.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF413 16792 bytes
font_01_sfnt_off00010c25.bin
f751e3928f7b3a6fdd44e486c4b3b7c888ac91d492f536736ae7cbf9c5b721c4
pdf-font-stream PDF embedded font (sfnt) at offset 0x10C25 17524 bytes
font_02_sfnt_off00013a3e.bin
2ac01ee7e14b3a9725c6de489f38dc617f117dab05740a1c571b2e8e16b41544
pdf-font-stream PDF embedded font (sfnt) at offset 0x13A3E 10756 bytes