Malicious PDF — malware analysis report

Static analysis result for SHA-256 07dbee8497d06cb8…

MALICIOUS

PDF

82.2 KB Created: 2021-09-04 06:28:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 14d77d1a92a9e06470c5c3668cac0b19 SHA-1: 49730cd51822fdd602a301cea34ed4cb4a24d47a SHA-256: 07dbee8497d06cb8a97c9e5db47269772db1a93c84f8977b7070e38aa98aecdd
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links. No scripts were extracted, and the document body was unreadable, so the attack pattern is inferred from the URL heuristics and the overall structure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://harrisitalia.it/uploads/file/jukakoxad.pdf
    • http://learnazia.com/fck/imagesfile/menujuni.pdf
    • https://bd-sokolovska.eu/userfiles/file/71071405018.pdf
    • https://www.hkha.org/ckfinder/userfiles/files/42168150420.pdf
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16113bb50de4c8---jukomepeduvabumuvid.pdf
    • http://vipnovini.bg/root/f/uploads/files/mapobakabuxam.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16079251fdeb06---35450265565.pdf
    • http://clinicaveterinariagussago.com/userfiles/files/gubokovewuvimazij.pdf
    • http://baohanhranghm.com/upload/img/files/rumugut.pdf
    • http://olech-rzeszow.pl/userfiles/file/kogefigaxi.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/d2a4e368cac4e1c2a38525c0e9340bb5/43394144444.pdf
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160ae32c0d5f62---69173197410.pdf
    • http://school15-tyumen.ru/f/kasobijew.pdf
    • http://cuatro-pr.org/sites/default/files/file/zuxarikon.pdf
    • https://candica.pl/ckfinder/userfiles/files/patume.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1608615e59220e---pirebemibureguzamadagu.pdf
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/1c115624a979dee5848f13cd168042f8/fogelatonesoligove.pdf
    • http://perchegouet.com/ckfinder/userfiles/files/lunewawomobupin.pdf
    • http://bougerpourstarlight.org/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/bosilo.pdf
    • http://makeyourpartnermelt.com/userfiles/file/56432351824.pdf
    • https://www.wikiwebagency.it/wp-content/plugins/super-forms/uploads/php/files/07eac99acaf16081bf6818ddf008722b/5079766940.pdf
    • https://areopag.ru/sites/default/files/uploads/tepivadolikajuk.pdf
    • https://angkoronetour.com/userfiles/file/kipesevigopivozexosunu.pdf
    • http://gurukripapublicschool.com/userfiles/file/waxipefapel.pdf
    • http://ankamet.com/userfiles/file/juxuxuwerox.pdf
    • https://www.pharmawell.eu/ckfinder/userfiles/files/dujiboseker.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=kader+kesehatan+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_off0000e14d.bin
be42329e3d9d8116958492efe5721897b2e95753ebf61369eea1c84d8e9c6acf
pdf-font-stream PDF embedded font (sfnt) at offset 0xE14D 10420 bytes
font_01_sfnt_off0000f8d4.bin
52c04fe24d9a8ad7b14463bb4c6a13c65d34cb5cee4bb4b98afb8437196a14e6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D4 16224 bytes
font_02_sfnt_off0001230f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1230F 16792 bytes