Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba21c086c9aacf05…

MALICIOUS

PDF

74.2 KB Created: 2021-09-14 00:58:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: af7aec2dee22c28767daa513cb3506d3 SHA-1: c699df2f6f898ea3573a639392d4a77ff5d482f7 SHA-256: ba21c086c9aacf05325ab38c9cabb43818f1d3cd580febd0d717611b29b2201e
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 malicious intent. The presence of numerous embedded URLs, many pointing to disposable hosting and utilizing UTM parameters, strongly suggests a phishing or link-farming attack pattern. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically highlights the nature of these links, aiming to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://garglob.ru/uplcv?utm_term=rope+hero+vice+town+new+update+game PDF link annotation
    • https://dovolena-jiznicechy.cz/uploads/57984640189.pdfIn PDF document text
    • https://www.abrasco.org.br/ckfinder/userfiles/files/46361210189.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/mezerumutizoz.pdfIn PDF document text
    • https://bunyaminerdemir.com/resimler/files/30402408657.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/78806963483.pdfIn PDF document text
    • http://orthocarecentroortopedico.it/userfiles/files/37316390699.pdfIn PDF document text
    • https://mehreganimaging.ir/images/upload/files/68654626898.pdfIn PDF document text
    • http://fanta-life.com/userfiles/file/69697117409.pdfIn PDF document text
    • http://congtyvima.com/images/Download/6431379524.pdfIn PDF document text
    • https://daulte.ch/ckfinder/userfiles/files/deguniz.pdfIn PDF document text
    • http://bio-scan.com/userfiles/file/76762034127.pdfIn PDF document text
    • https://sicurezzaips.it/uploads/file/93906031298.pdfIn PDF document text
    • http://shannonlakeestates.org/fck_images/file/dimukegalotopiwafur.pdfIn PDF document text
    • https://skykharchono.mn/editor/files/81258521161.pdfIn PDF document text
    • https://fertilizerproductionprocess.com/d/files/xitik.pdfIn PDF document text
    • https://www.playitdirect.ca/ckfinder/uploadfiles/files/gekekitivixow.pdfIn PDF document text
    • https://actorconseil.com/files/file/49807067975.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fa91dd24d7---xigetilafenawigisisa.pdfIn PDF document text
    • https://przygodanaukrainie.pl/admin/ckfinder/userfiles/files/tidumufitewoxigila.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613862005cdad---pijaponu.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_off0000c207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC207 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000da19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA19 15868 bytes
SHA-256: 7944adf893a6573f9d22a67fa9f797e58f5e8e34cfc7c264536918e57776f728
font_02_sfnt_off0001028b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028B 11044 bytes
SHA-256: 387328515c5133a0af0d5fe9c44649f480529ddbc6ca62e2e8a7a4277157bde4

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