Malicious PDF — malware analysis report

Static analysis result for SHA-256 c108a2a980731871…

MALICIOUS

PDF

75.3 KB Created: 2021-08-05 21:45:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 1cf004a664eb35229432760348497058 SHA-1: e7fc29fd765958fac2e4ff68f23d1b72e256293b SHA-256: c108a2a98073187134d15c2c1973db1953cb3943dd43bfc9cfcf96d4bcdc2ce1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to compromised WordPress sites, a common tactic for hosting malicious content or phishing pages. Heuristics indicate this PDF is a link farm on disposable hosting, and ClamAV detected it as a phishing trojan. While no scripts were explicitly extracted, the nature of the URLs and the ML classification suggest a malicious intent to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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 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://crewmak.ru/uplcv?utm_term=tabla+para+machuelo+npt PDF link annotation
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/fc55f59cd76cce081ef4d1648744ca11/20343957027.pdfIn PDF document text
    • https://hgb.se/filer/file/kodesudebumatova.pdfIn PDF document text
    • http://vanhacollection.com/images/files/84693407685.pdfIn PDF document text
    • http://aclamerica.com/customers/CMS-IMAGES/file/vefopolozubunetutebezanij.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/36be81f49287c00325d1b20567fe6f05/zogepukazozepalutenuzokux.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/4453ec17fc6a98f37a19221a315d40ff/17443747428.pdfIn PDF document text
    • http://szpital-sulecin.pl/images/fckfiles/file/46888889727.pdfIn PDF document text
    • http://dh-life.com/ckfinder/userfiles/files/zajural.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/97gfu450bjltfo508d0mjjb930/tewinukibiwitom.pdfIn PDF document text
    • http://perchegouet.com/ckfinder/userfiles/files/80122843495.pdfIn PDF document text
    • http://canphantich.net/Images_upload/files/42187864436.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073711ed53a8---81693221891.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/debuwumajomedadotuded.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ba089d81cb7---bamumosekomanedet.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160aafbb26efc8---vasofipesujetizutigok.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/foppj97hes24vt18cdblhq3dj5/21530301703.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/gusenelolera.pdfIn PDF document text
    • http://stuarteisbrucklaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lifexifezazukuwu.pdfIn PDF document text
    • http://arslanemlak.come/file/62087278120.pdfIn PDF document text
    • https://stallion-international.com/userfiles/file/51495139520.pdfIn PDF document text
    • http://nexxosrealty.com/userfiles/files/bokoli.pdfIn PDF document text
    • https://saam.vn/images/content/file/79979531124.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16075921b9bfea---jurosifosobezurij.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606c79708af00---zipanaloneselepak.pdfIn PDF document text
    • http://lustigersteirer.at/userfiles/file/48071942936.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5DE 16044 bytes
SHA-256: a2e2d32d61f792c91a96cf8f6358aeaac27df3323faf78efb6f98feef76e36aa
font_01_sfnt_off0000ee34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE34 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001064b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1064B 10584 bytes
SHA-256: 696c246628eacf53ea2615d0217c460874b4655335ad4dc3468bf708a4aa238b

Open this report in the interactive analyzer, or submit your own file for analysis.