Malicious PDF — malware analysis report

Static analysis result for SHA-256 6975d0e74fdf3c69…

MALICIOUS

PDF

99.1 KB Created: 2021-06-25 21:30:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 228c8a3eb31cd1065e60ba13a01bd609 SHA-1: b378e0d04d0396d17a7af539072f861645719229 SHA-256: 6975d0e74fdf3c6976d2b3125b2095b753a8edf49f4699a36ac1a4c6add790c2
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of multiple links on disposable hosting and the use of UTM parameters further support the attack pattern of redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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://asset-books.com/userfiles/file/wovapogi.pdf
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/r1ccmqqia3enl7l16mof08hfmj/99713109196.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a110ff7dc6a---kamodikirozukomu.pdf
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/v11i8qo762pi0cg0n0n5dnjfp8/75723811699.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/e292c59378e9f7a9d0607ebc05db23c5/241951429.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc796d49f8---firarokasoj.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d92d555afc---paxafekuguditaperuzujesi.pdf
    • http://ampletrekking.com/userfiles/file/32766063041.pdf
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/551dccd508d880b8b37e949acae30ae0/31134972127.pdf
    • http://modnyi-buket.ru/uploads/files/18483963353.pdf
    • http://alexlunacoach.com/img/editor/file/1487159709.pdf
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be07ca3acbc---24346017759.pdf
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/h6pam7iffrp2gu96a56kmll8t2/vokasogexusujazon.pdf
    • http://vladjurnalist.ru/archive/file/99887465601.pdf
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/iissubanpsscv7dgbk65hpqq9u/genuborijujemevatobo.pdf
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/3543f8cb6d066a284c39ff0a881b7688/22971261099.pdf
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9946dc2b35---bipad.pdf
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c92dea11c87---bumalewalupotu.pdf
    • http://msamerica.net/clients/873634/File/molipujewezil.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608191487589f---45678959879.pdf
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/c85b27a3b8d518199c535560835f4055/92103613226.pdf
    • http://mini-garden.ru/userfiles/file/vilikidox.pdf
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/5bbb63921bfe8caa4eadb6bf4e13c811/16149111073.pdf
    • http://amghanoi.com/images/ckeditor/files/denuzewugorovimuwedemobi.pdf
    • https://dietacud.eu/upload/file/37116207572.pdf
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/22f691286a1529807cf96857547f2cbf/mevaxinofewavafo.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=shine+on+you+crazy+diamond+chords+easy
    • 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_off0001207a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1207A 16792 bytes
font_01_sfnt_off00013891.bin
f7eba2a33a987aa7b61d49a6e0e22e5b2ef634087775926df8f429b383eef94a
pdf-font-stream PDF embedded font (sfnt) at offset 0x13891 10840 bytes
font_02_sfnt_off0001516a.bin
9e5b160b3dbfb5391de2baba6e42903ca79c87e7e536de6c69db705994e8f3f8
pdf-font-stream PDF embedded font (sfnt) at offset 0x1516A 17476 bytes