Malicious PDF — malware analysis report

Static analysis result for SHA-256 8683d56f71a2038f…

MALICIOUS

PDF

91.3 KB Created: 2021-09-19 15:28:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9cc1a830e08eb684de6e6c4c2b1d5ca9 SHA-1: a1e1e1f91686ce045174be568128026273693ce1 SHA-256: 8683d56f71a2038fb2b329f3bb67d02a7158ca9a8a03a137133849e24ec5e1a2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous URLs pointing to potentially compromised websites and disposable hosting, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure, likely intended to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://irlanc.ru/uplcv?utm_term=bagas31+movie+maker
    • https://jiu-hang.com/upfiles/editor/files/96416757950.pdf
    • https://dynasty888.com/image/files/20210911_135610.pdf
    • http://viorina-deko.com/images/file/54654610819.pdf
    • https://tatsolarlight.com/uploads/files/vabebivokelewakajafati.pdf
    • https://joepromenshealth.com/wp-content/plugins/super-forms/uploads/php/files/932a5015e04f4e50ea6828f2d27d44d6/kukogosasunozifig.pdf
    • https://festacontinua.it/public/file/11951379684.pdf
    • http://hexindechem.com/upload/files/febagexepomusejopotetifen.pdf
    • https://profitaler.com/UserFiles/file/wokabalopifumepen.pdf
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/2e58b64121cdeb9f209e8fed9e1e5359/31070843071.pdf
    • http://spzpoz-zdunskawola.pl/upload/file/66394242317.pdf
    • https://castilloexterior.net/ckfinder/userfiles/files/55009439293.pdf
    • https://ewdel.cz/ckfinder/userfiles/files/tililonubewosoxeponur.pdf
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140bc9956374---dilazuvuvazu.pdf
    • https://safetyhanoi.com/userfiles/file/jabagigaxafowu.pdf
    • https://nbcmedia.vn/ckfinder/userfiles/files/mifomukiwexarokisobomefu.pdf
    • http://www.corazondelsol.es/ckfinder/userfiles/files/86178726851.pdf
    • https://autonoleggioassereto.com/file/dovabolaguzerixolutevumu.pdf
    • https://keyseries.us/userfiles/file/44221030984.pdf
    • http://dansecyr.ca/pdf/file/firupoxufozuvi.pdf
    • http://thegioichuyendong.info/app/webroot/upload/files/kagimoxavutapuzefu.pdf
    • http://bjaimama.com/data/upload/2021/09/file/202109190559305606.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_off0001024f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1024F 16792 bytes
font_01_sfnt_off00011a66.bin
58f92d6a7e17d4273dca90cdb928bfb1a9a9c3f351be5436c2c717d463d91678		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A66 10636 bytes
font_02_sfnt_off000132e5.bin
63c326cc04d6656690994a9cb36e97296fe3433080377ef5817bc975334b082b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x132E5 17440 bytes

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