Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5cb993b2a800682…

MALICIOUS

PDF

84.6 KB Created: 2021-09-20 13:43:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 2b10556d5d21b61f8bc872de6223e82b SHA-1: 14e9bcf3ac4e609dfeb4285f246a86af92cf9365 SHA-256: a5cb993b2a800682ace6d2470693bb685c924ea19fee5b9c573c9b4f035de88b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a malicious document designed to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://huntic.ru/uplcv?utm_term=iphone+6+plus+16gb+price+in+bangladesh PDF link annotation
    • http://henskeschildersbedrijf.nl/upload/jotanujujixijitafogavovix.pdfIn PDF document text
    • http://eko-gospodarstwo.eu/files/file/wixatutusowupinefabibetan.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/tobevitupadagaderupov.pdfIn PDF document text
    • http://sandsflooring.co.uk/ckfinder/userfiles/files/36224716485.pdfIn PDF document text
    • http://investgeorgia.ge/userfiles/file/70921401497.pdfIn PDF document text
    • http://4grd.com/cmsimages/file/20888824643.pdfIn PDF document text
    • https://ville-saintleonard.fr/pdf/mesasif.pdfIn PDF document text
    • http://sportingclubalbinia.eu/userfiles/files/tovumefugobinatupatuw.pdfIn PDF document text
    • https://thietkewebseo.com/webroot/img/files/nudofixovemotujupefodepa.pdfIn PDF document text
    • https://ou-ravda.com/ckfinder/userfiles/files/81007350860.pdfIn PDF document text
    • https://coil.hk/upload/files/11893975982.pdfIn PDF document text
    • http://7m-shop.com/userfiles/file/dobobugalafutinejoket.pdfIn PDF document text
    • http://rootbeadmill.com/upload_fck/file/2021-9-6/20210906121136120697.pdfIn PDF document text
    • https://exlite.it/ckfinder/userfiles/files/90329557476.pdfIn PDF document text
    • http://jjw-led.com/userfiles/file/bawaxozapulexemerir.pdfIn PDF document text
    • http://yingtailong.com/upload/file/210920065044355081toh2075wmtom.pdfIn PDF document text
    • http://ilovehikari.com/uploads/files/11395977939.pdfIn PDF document text
    • https://fabriziochessa.it/userfiles/file/960141579.pdfIn PDF document text
    • http://diplomat2014.ru/ckfinder/userfiles/files/49818901349.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/a7f845cd779bdb2391ecf343268c1e28/sagubi.pdfIn PDF document text
    • http://tverzhilservis.ru/foktver.ru/ckfinder/userfiles/files/juwilukolaludapuwigivom.pdfIn PDF document text
    • http://rzn-house.ru/upload/file/86924518428.pdfIn PDF document text
    • https://khabul.mn/mmpa/userfiles/files/zisewajabonobuwaf.pdfIn PDF document text
    • http://smcertificationservices.com/userfiles/files/wijotafaremotafefazijus.pdfIn PDF document text
    • http://cropscipublisher.com/files/upfiles/file/vunibudexaf.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_off0000dd64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD64 19620 bytes
SHA-256: 8c2e930d1cdc6604aa992abcb1db9dfd8b8e376ada4e981a3f1a923cea7b0f8f
font_01_sfnt_off000111a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000129bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129BB 11108 bytes
SHA-256: 1fe139bbfb67caee7f71f3cf759add13a2d91a031660a830e2a1148dc1dc3b47

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