Malicious PDF — malware analysis report

Static analysis result for SHA-256 6afbbc3d855011fe…

MALICIOUS

PDF

93.9 KB Created: 2021-09-17 14:38:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: dbe0892609fc2ccc300e8114ba1426a8 SHA-1: 19d10227c617af849cbbbfc5f07e419d7542c966 SHA-256: 6afbbc3d855011fe32e979079e27a00d675d668e3ad4613e75d8ef62e6464c0b
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a payment redirection lure. It contains numerous external URIs, including one pointing to 'smidgel.ru' with a query parameter suggesting a Fortnite download, which is likely a deceptive tactic. The PDF structure and embedded links suggest it is designed to redirect users to malicious sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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://smidgel.ru/uplcv?utm_term=epic+games+android+fortnite+download PDF link annotation
    • https://duproject.com/uploadEditor/files/27540529541.pdfIn PDF document text
    • http://songhakbbq.com/uploads/files/pikonudewimowudigipojewul.pdfIn PDF document text
    • http://tycoonmedical.com/userfiles/file/14096363316.pdfIn PDF document text
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/4875311713.pdfIn PDF document text
    • https://boucherienabli.com/uploads/FCK_files/file/66199230733.pdfIn PDF document text
    • https://kuepancong.com/contents/files/moseru.pdfIn PDF document text
    • https://absoluteanytime.com/media_file/files/files/56960772676.pdfIn PDF document text
    • https://motoquadro.de/userfiles/file/zekimiwazizugufizeladofe.pdfIn PDF document text
    • https://medgal.pl/admin/ckfinder/userfiles/files/takike.pdfIn PDF document text
    • http://hometextiles-consultant.com/ckfinder/userfiles/files/lovafavimirepibekafaguta.pdfIn PDF document text
    • http://tce.vn/imagesflashupload/file/25950062154.pdfIn PDF document text
    • http://esistore.be/userfiles/file/lenesitavevusufigufog.pdfIn PDF document text
    • http://one9five.com/userfiles/files/xavarin.pdfIn PDF document text
    • http://studiotravenzolo.it/userfiles/files/kaxekikisu.pdfIn PDF document text
    • https://slotpt2.com/contents/files/nikojos.pdfIn PDF document text
    • http://xecuoihuyhoang.com/uploads/userfiles/file/7500681602.pdfIn PDF document text
    • http://wxbeimei.cn/upload/ckimg/files/202109161859498060.pdfIn PDF document text
    • https://fengshan-zhennangong.org/upload/ckfinder/files/78514623520.pdfIn PDF document text
    • http://kevinmcallisterlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/50771259104.pdfIn PDF document text
    • https://1000families.eu/userfiles/file/65301400239.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef49fdcf71---59853091047.pdfIn PDF document text
    • http://artpolyclinic.com/file/files/gukotezi.pdfIn PDF document text
    • https://gruntbudowa.pl/files/file/zukuki.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_off00010a08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A08 17988 bytes
SHA-256: edae1f7f11d0c235dd88c0c2822c602492b5c7e6c9619320b4a3de1c5cc14da9
font_01_sfnt_off000138c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000150df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150DF 11032 bytes
SHA-256: 2b931b4904a0daaa670beee1847dbcbd4605c0a8fba1722427d9de99faaf198b