Malicious PDF — malware analysis report

Static analysis result for SHA-256 1011096f5c7504f2…

MALICIOUS

PDF

81.2 KB Created: 2021-09-17 11:56:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 855b078b8d6e6c945325086ffc240211 SHA-1: b3d84d6dcd9ce4a25a16674b0df4700ec30a19d8 SHA-256: 1011096f5c7504f20db7210c7739e0d75574b702aab4bf82e3dbf4364b28cc1b
156 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV. It contains numerous embedded URLs, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of multiple external URIs and link farm heuristics indicates an attempt to lure victims to external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://queure.ru/uplcv?utm_term=online+server+backup+pricing PDF link annotation
    • https://jakspravnenapsa.cz/userfiles/file/83228722517.pdfIn PDF document text
    • http://futuralagoparking.eu/userfiles/files/97480953783.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133cae80f0b4---dopogute.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130850f9e392---mapamolotevotok.pdfIn PDF document text
    • https://velvetskin.pl/wp-content/plugins/super-forms/uploads/php/files/869c16e9a579795c0ed9b87c5eb6b99f/narolebugejokaxegutiliv.pdfIn PDF document text
    • http://www.serge-valentin.net/ckfinder/userfiles/files/16101418717.pdfIn PDF document text
    • http://ingatlantv.tv/userfiles/files/34014436749.pdfIn PDF document text
    • http://sumbulefendiegitimvakfi.com/resimler/files/84365402348.pdfIn PDF document text
    • https://cristalensi.com/public/File/maturo.pdfIn PDF document text
    • http://surausa.com/uploads/files/tuzuvugilega.pdfIn PDF document text
    • http://janaturismointegrato.com/uploads/file/52067214669.pdfIn PDF document text
    • http://gavionescodeinsa.com/userfiles/kovonibukewenujalerazowi.pdfIn PDF document text
    • http://sheilahancock.net/blogfck/file/77671863950.pdfIn PDF document text
    • http://rvhifi.cz/files/file/31777152691.pdfIn PDF document text
    • http://unite-chem.cn/upload/files/37476363522.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/ec0eb77da7188124efe2ffce71a9a77e/suvekukokidejifene.pdfIn PDF document text
    • http://morard-mcf.fr/data/Files/pujejasusoro.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/mawenujamebe.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/1613437c244f58---94002926266.pdfIn PDF document text
    • https://karlholmbygg.se/UserFiles/files/84241808708.pdfIn PDF document text
    • http://debnine.net/UserFiles/File/bisezapikamobir.pdfIn PDF document text
    • http://touristclub.in/userfiles/file/tikifidedipaterirasot.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613a17ef61d95---zakofaref.pdfIn PDF document text
    • http://beiks.info/public/file/19139042836.pdfIn PDF document text
    • http://ivankrivanek.com/userfiles/file/77053222007.pdfIn PDF document text
    • http://energosol.pl/images_cms/file/79534718902.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_off0000d9e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9E8 17192 bytes
SHA-256: b0c1908a4db1f5f5e7f413400be33b8c2d3d782d61776ae234e648b7d2990c77
font_01_sfnt_off0001068a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1068A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EA1 10752 bytes
SHA-256: 92d4c4939fda63597f29f8d69f0709e3638acfd517ba383f60eb3af5f862ad53

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