Malicious PDF — malware analysis report

Static analysis result for SHA-256 1777cb60be2f8798…

MALICIOUS

PDF

78.6 KB Created: 2021-09-09 23:10:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: a99596fd8b7462178cef7f41ed1b8667 SHA-1: 49caa6f7a3aa9bb95aa8a9f63eb4fa9a22429f7b SHA-256: 1777cb60be2f8798793ab164a0ca53a9ea95c06b23e097e16bc9df233d8dc262
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. The presence of numerous external URIs and a 'link farm' heuristic suggests the document's primary purpose is to redirect users to potentially malicious websites. The document body is heavily obfuscated and unreadable, providing no further context.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/uplcv?utm_term=halo+theme+roblox+id PDF link annotation
    • https://nhahangbienhaitien.com/uploads/files/84500930193.pdfIn PDF document text
    • http://sangjeom.com/userfiles/file///jatij.pdfIn PDF document text
    • http://ufnk.fr/app/webroot/files/file/lufukiruvijelewugeti.pdfIn PDF document text
    • http://cofetariafraguta.ro/UserFiles/file/kubokabo.pdfIn PDF document text
    • http://hiro-seiko.com/upload/files/wilumufoxivavonobemedekix.pdfIn PDF document text
    • https://campermagazine.tv/public/file/61005008901.pdfIn PDF document text
    • http://vizit-k.net/uploads/editor/files/28435499632.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/41852706317.pdfIn PDF document text
    • https://jmclimatizacionhvac.cl/images/subidas/file/22537191260.pdfIn PDF document text
    • https://vsetinrally.cz/userfiles/file/96130935922.pdfIn PDF document text
    • http://autosklo.sk/pictures/file/35849226220.pdfIn PDF document text
    • https://xn--espaoldetalca-lkb.cl/var/www/html/upload/file/kalofosatoxafaz.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/36882169535.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/577486845.pdfIn PDF document text
    • https://mlbcsimleague.com/ckfinder/userfiles/files/mikekela.pdfIn PDF document text
    • http://mjacz.cz/soubory/files/wafotakifuni.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/ke384e8nglo8bcgvuga2ebs449/peluweserajugaw.pdfIn PDF document text
    • http://3suntech.com/UploadFile/file/20210905023820079.pdfIn PDF document text
    • https://pelletier-tp.fr/ckfinder/userfiles/files/19389751812.pdfIn PDF document text
    • http://thuduchouse.vn/pics/file/bipidafodova.pdfIn PDF document text
    • http://tokyosushilohaus.com/uploads/files/jipebipifeleniz.pdfIn PDF document text
    • https://www.adoz.cz/ckfinder/userfiles/files/pexolusiforewavev.pdfIn PDF document text
    • http://hasdeu.md/data/userfiles/files/runiruregomofizam.pdfIn PDF document text
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1612f35bbce475---ragefajisutur.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_off0000cf24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF24 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE736 17800 bytes
SHA-256: f483b6ea82f4a601c35151c33e23d59ff0d904051c3b4e159ff9f8934ae87b8e
font_02_sfnt_off00011557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11557 10472 bytes
SHA-256: 8c137c114c7641b0381c9c4ea981c2af2a227580f3604a752f0001e2cb3fd474

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