Malicious PDF — malware analysis report

Static analysis result for SHA-256 7abc47bcc5d53ad2…

MALICIOUS

PDF

84.7 KB Created: 2021-09-06 23:11:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c38488ca92019d589b03488dc9a8e16e SHA-1: 856580eec7bb4ef7e3969a5f89b1f64628407950 SHA-256: 7abc47bcc5d53ad2ac855c5f39b54b3f9fc5d9eb67c9ac3161917a255b2efc2d
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that form a link farm, directing users to potentially malicious or phishing sites. Heuristics indicate these links are hosted on compromised WordPress uploads and disposable domains, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://synerhu.ru/uplcv?utm_term=difference+between+interpersonal+communication+and+mass+communication+pdf PDF link annotation
    • http://vhz.cz/user-files/vifuzemosotidirugoxepuwe.pdfIn PDF document text
    • http://royalrep.com/userfiles/files/vowawupafipafekosapibu.pdfIn PDF document text
    • http://kientrucnhacuagio.com/upload/files/22434974191.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/856532ae5e08a26473ef5acd1ea0c452/41902847968.pdfIn PDF document text
    • http://mp-journal.com/media/file/teriwofifopabinaja.pdfIn PDF document text
    • https://bitree.com/ckfinder/userfiles/files/welomofotuxilapitarutoluz.pdfIn PDF document text
    • http://aydinservis.com/ckfinder/userfiles/files/29090959381.pdfIn PDF document text
    • http://apartament-krokus.pl/userfiles/file/58648680693.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4cdde91e29---99110962144.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/74898945232.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16080faf2876d8---23761312001.pdfIn PDF document text
    • http://chi-kara.net/userfiles/file/jafuvexavisiratosoru.pdfIn PDF document text
    • https://people11people.com/uploads/File/42000002165.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8f5a220cb4---lubopimozonuziziwas.pdfIn PDF document text
    • https://singaporenotarypublic.com/wp-content/plugins/super-forms/uploads/php/files/c350e74edcb0be0c1cc2ebe790f1e6d6/59110711768.pdfIn PDF document text
    • http://fkm-lux.by/var/upload/file/gerewatemem.pdfIn PDF document text
    • https://krono-original.vn/Images_upload/files/37532386774.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/5c2da0d7b2aa2277a6fcd177569ea893/dazis.pdfIn PDF document text
    • http://chemicalengineers.ie/images/fatilenuloxu.pdfIn PDF document text
    • http://matonaklawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fabezaf.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d773782fa6---93210905612.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160e4d44e28c8b---57615031750.pdfIn PDF document text
    • https://agermag.ro/mm/file/22935330437.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c629d7291ee---90852659427.pdfIn PDF document text
    • https://theloneranger.tv/clients/loneranger/ckfinder/userfiles/files/11391503280.pdfIn PDF document text
    • http://salsainkonstanz.de/media/files/bimuxefovaduzuxovaxiterem.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_off0000e487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE487 11108 bytes
SHA-256: 6781e5f1a569af68be1c5daf90c943380f8e8903a648297b26b9321965604379
font_01_sfnt_off0000fe47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE47 18096 bytes
SHA-256: b1673541e278321cd7d15f10939acb19cdc81b63afd42b61997fab243ec5bc35
font_02_sfnt_off00012bec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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