Malicious PDF — malware analysis report

Static analysis result for SHA-256 c118f24d1c9df05d…

MALICIOUS

PDF

68.6 KB Created: 2021-09-25 03:17:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c8e66713d3127719c0c9c42faf41a401 SHA-1: 3e598170d1f90349c7e1df02646a0b45ef249732 SHA-256: c118f24d1c9df05d07a09ba71bfcb96d46249feb64b2135f6489aeb1bad45fd7
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic suggest the document is part of a link farm designed to redirect users to malicious content or phishing sites. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://queure.ru/uplcv?utm_term=gps+hack+pokemon+go
    • http://thanuyentea.com/ckfinder/userfiles/files/lojuwupofodudadaxisotuwe.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/aa976071db3c4253661b5f9b814c5ba1/niwurow.pdf
    • http://kyea.org/imageuploads/58651755598.pdf
    • https://west-holding.com/userfiles/file/17354587672.pdf
    • http://aodaibooking.com/FileData/ckfinder/files/20210923_20B0FB81144FE05D.pdf
    • https://accesoriosalmayor.com/images/userfiles/file/fipaxobatowinejixububak.pdf
    • http://directopinion.biz/uploads/FCK_files/file/72700590940.pdf
    • https://www.savininkai.lt/ckfinder/userfiles/files/67100757978.pdf
    • http://kredoteka.ru/uploads/file/91939358267.pdf
    • http://businessvaluationapp.com/fck_files/file/nifuzoxudolulawedudakalen.pdf
    • http://montpellier-businessplan.eu/mbp/upload/images/images/upload/ckfinder/94831473518.pdf
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613204ead9254---2374980310.pdf
    • https://www.benkorner.nl/admin/library/ckfinder/userfiles/files/12763485872.pdf
    • http://toitureetfacade.fr/data/Files/tijamixutunu.pdf
    • https://alkalacarservice.com/public_html/userfiles/file/bolekodenefo.pdf
    • http://location-appartement-venise.com/italie_documents/files/28644519213.pdf
    • http://ya-ke.cn/admin/upload/95660472391.pdf
    • http://kavernoklub.com/campannas/file/35295010407.pdf
    • https://babamansurkurhuseyin.com/uni/yuklemeler/file/dewufivubiwiloderowamogog.pdf
    • http://szigetkozpalinka.hu/userfiles/file/52349423204.pdf
    • https://budgetparking.ca/admin/uploads/file/88882982665.pdf
    • http://deeringbayrealestate.com/userfiles/files/82303407522.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_off0000adb0.bin
4c42191fc1bff78469dbaa4757ce1f6e07b26d424e6d6c3ace6793139865c570		 pdf-font-stream PDF embedded font (sfnt) at offset 0xADB0 10616 bytes
font_01_sfnt_off0000c5d3.bin
c1b8086572e2cd97815c2b5207f775c96f54613a8bc4270aae24612ae14aa591		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5D3 15492 bytes
font_02_sfnt_off0000ed3e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED3E 16792 bytes

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