Malicious PDF — malware analysis report

Static analysis result for SHA-256 a160f46b43aade99…

MALICIOUS

PDF

87.5 KB Created: 2021-09-19 11:06:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e0bc24b02ce04e390b941de34ad12622 SHA-1: cd241bd271537c6821fcc8af1185cc12dab7d44a SHA-256: a160f46b43aade99eaae76fdd893e3eba31b517c2b36bd54ae11120604714b72
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains multiple lures, including an advance-fee scam related to lotteries or parcels, and a lure to install a browser extension or update. These social engineering tactics are designed to deceive the user into clicking malicious links, which are present throughout the document and point to various PDF files hosted on potentially compromised websites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 8

  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://pixomot.ru/uplcv?utm_term=chrome+for+android+freezing
    • http://oipipleszno.pl/userfiles/file/84474453569.pdf
    • https://posh.hr/files/peligasimimibor.pdf
    • http://crmrealty360degree.in/userfiles/file/65130510314.pdf
    • https://fereshtegan.net/basefile/fereshtegannet/files/warebizuwudu.pdf
    • http://thetsaban3watnuea.com/UserFiles/file/46598147648.pdf
    • https://alirezamirmohammadi.com/images/upload/files/26391042900.pdf
    • http://rainhouse.kr/data/editor/file/1943961775613e7f4d13721.pdf
    • http://adaviestransportltd.com/userfiles/file/93138031032.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613952dd70d48---jozibozedojana.pdf
    • https://franchise-vietnam.com/app/webroot/img/files/32662196732.pdf
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/161440704ba73c---sexoxigowaromugikokosema.pdf
    • https://bibliotheque.ville.deux-montagnes.qc.ca/ckfinder/userfiles/files/zijiseme.pdf
    • http://www.anclupnapoli.it/userfiles/file/fakojedubufaketulenuk.pdf
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/38727255751.pdf
    • https://decoveinvestment.com/userfiles/file/pajizudepaziw.pdf
    • http://autolavaggiocraparotta.it/userfiles/files/dosoxonasunabiwo.pdf
    • http://squash-fitness.cz/userfiles/file/winozef.pdf
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1613065b7e1da7---vinifufak.pdf
    • http://billedbutikken.dk/articlefiles/file/dapapulujevorizafakuwitu.pdf
    • http://connectcontrol.net/files/userfiles/files/xevikeborodujobami.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_off0000f273.bin
c380a08a684ac5f1df700eb6661303f95af1ec6108063b57af575fa5a5c02ada
pdf-font-stream PDF embedded font (sfnt) at offset 0xF273 10580 bytes
font_01_sfnt_off00010a38.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10A38 16792 bytes
font_02_sfnt_off0001224a.bin
8973525992de499ee8c926aa670fe3e5b2c9238e484d4ed2417c89ddd176e867
pdf-font-stream PDF embedded font (sfnt) at offset 0x1224A 17960 bytes