Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfad54d7b857653f…

MALICIOUS

PDF

85.2 KB Created: 2021-09-15 23:22:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8ac7f87c1152218a7a52146ba160e36c SHA-1: a3ec8e4643ec6c9cbfe0606c514a55ce8a4f8c37 SHA-256: bfad54d7b857653f49916a099002c9baf2195aefe96c7afef4a24c039484272a
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam. It contains numerous external URIs and links to disposable hosting, suggesting a phishing or redirection attempt. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a lure designed to trick users into believing they are receiving a prize or package, which is a common advance-fee fraud tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=how+do+i+get+more+emojis+on+my+android+phone
    • http://sayarbobinaj.com/file/93676372384.pdf
    • http://bibrka-school.org.ua/ckfinder/userfiles/files/jugaloponakinozeketitabe.pdf
    • https://zzhqhi.com/d/files/89377179077.pdf
    • http://decamiones.com/userfiles/file/91003309115.pdf
    • http://qtjdb.com/UploadFile/2021/09/12/file/20210912_144039_148.pdf
    • http://capableapp.com/uploads/files/woguvonebimo.pdf
    • http://mrspk.com/ckfinder/userfiles/files/15273426495.pdf
    • http://umrllc.com/userfiles/files/rilexavazederibis.pdf
    • http://emanuelmlevin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fuwiramoroneseb.pdf
    • http://itaxabc.com/userfiles/file/20210902103204_661299615.pdf
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613de44116874---bosuwogudosukukulare.pdf
    • http://techscreening.com/userfiles/files/83233617336.pdf
    • http://geojeoceanhotel.com/userfiles/file/20210904062223.pdf
    • http://alexandersorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/65620629610.pdf
    • http://imailbox.nl/images/uploadedimages/file/vajanuwomasurara.pdf
    • http://archidaldegan.eu/userfiles/files/12990649826.pdf
    • https://assignmentmart.com/ckfinder/userfiles/files/gilovewejifejafowifaxo.pdf
    • http://demo-jesma.shopcloud.es/ckfinder/userfiles/files/40869614996.pdf
    • http://flynewsletter.com/uploads/file/giwisorid.pdf
    • https://sensesgrouphk.com/louis/STARKGROUP/ckfinder/userfiles/files/zirigebiwabi.pdf
    • http://tootingtaxi.com/survey/userfiles/files/53806516436.pdf
    • http://art-ball.net/files/file/24901181914.pdf
    • https://ms02bet.net/contents/files/94853448504.pdf
    • http://gimnazjum-krasiczyn.pl/img/userfiles/file/63486982902.pdf
    • http://epilia.com/upload/FCKEditorfile/11924263688.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_off0000e76c.bin
e930febae512f4b60b370170fc5f86f21c01ed0ca3e2189016845dbb4d25a43a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE76C 17656 bytes
font_01_sfnt_off0001159e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1159E 16792 bytes
font_02_sfnt_off00012db5.bin
fc216a9786a884520b801ca66f24e560541ac9543064d5f15635e25d24c0b64a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DB5 11112 bytes

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