Malicious PDF — malware analysis report

Static analysis result for SHA-256 015dfd65a4b30d2d…

MALICIOUS

PDF

69.3 KB Created: 2021-09-27 12:17:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a1c58527b8ed913b1d1de52e7441f944 SHA-1: f0920b3bc4588193b75bb9bfc4e067fac932ab4c SHA-256: 015dfd65a4b30d2db0412da5b113519b7c0f7777742195a1bba438113ca04bd0
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs that point to compromised CMS uploads and disposable hosting, suggesting it functions as a link farm. These links likely lead to phishing pages or further malware distribution, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://garglob.ru/uplcv?utm_term=android+box+mac+address
    • https://menlopark.com/wysiwygfiles/file/84889021011.pdf
    • http://dorp.pl/userfiles/files/94229122373.pdf
    • http://gzcil.com/uploadfile/files/35599934725.pdf
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142fbb765eea---61297914451.pdf
    • http://architettorobertafasola.eu/userfiles/files/wilejamofibulo.pdf
    • http://eko-gospodarstwo.eu/files/file/845632641.pdf
    • http://damnoen.com/ckfinder/pho/files/6263078748.pdf
    • https://anmoul.com/userfiles/file/22421855412.pdf
    • http://begemot-rus.com/uploadfiles/file/2021092313205973499.pdf
    • https://daaeportrett.no/upload/file/59939909905.pdf
    • http://visit-pune.com/userfiles/file/15325564693.pdf
    • http://areawifi.com/DESARROLLO/userfiles/files/xonenekebekugizebonobokow.pdf
    • http://diegogenna.it/userfiles/files/73647283413.pdf
    • http://eg-connect.com/uploads/editorfiles/file///49715039871.pdf
    • http://sineadstone.com/userfiles/file/67530064472.pdf
    • http://mottaing.eu/userfiles/files/67162532971.pdf
    • http://bastola.org/userfiles/file/xobosajabakizituvebe.pdf
    • http://cheumst.com/upload/fckeditor/file/medemawutamasuv.pdf
    • https://llbyggodesign.se/UserFiles/files/33317444880.pdf
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/0f5f27d40d5bd40f6dfbf227b31ba9d6/dizavesobozojoxofasok.pdf
    • http://gniortho.com/files/Upload/file/xiramami.pdf
    • http://tbeaindia.com/userfiles/file/75400282043.pdf
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16140542302cae---92168498963.pdf
    • 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_off0000b240.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB240 16792 bytes
font_01_sfnt_off0000ca52.bin
d109cc08385e276fec37e1ea4c3f6105b403a7e13a8e77229fb3f9c278fd37a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA52 14788 bytes
font_02_sfnt_off0000ef4b.bin
ecaf99896a02d378288df934a35ddef657420af774c8a30e7fd7179a2506d753		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF4B 10608 bytes

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