Malicious PDF — malware analysis report

Static analysis result for SHA-256 055f91c414d7f69f…

MALICIOUS

PDF

95.1 KB Created: 2021-07-01 10:19:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c9f72773d164b60a3e26b179e7ec2e1b SHA-1: 35015444c486eb2d4bf4997e53a0b4e21db9006a SHA-256: 055f91c414d7f69f35ed1c42858fc361ecd8603659d7af23b753cb50fc2e9ac8
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, exhibiting characteristics of an advance-fee scam. It contains embedded JavaScript, suggesting an attempt to execute malicious code, likely to download a second-stage payload from one of the numerous external URLs. The document's structure and content indicate a lure for a lottery, prize, or parcel delivery scam, aiming to trick the user into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 9

  • 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.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://flexa.cz/docs/file/pumevudavoxov.pdf
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7511e433d9---jebazanepewewisitelap.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c68ddce5de3---61482325328.pdf
    • http://randalljroutson.com/clients/44711/File/73438453482.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7e6abf157---sijavuroj.pdf
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/3c3ef2ebec215e0b495452dd3e35681f/21386829968.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d09afd60748---75838502221.pdf
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/un91tsbehsgaufojhl04a3lp61/somasojanabigad.pdf
    • http://ipost.mn/ckfinder/userfiles/files/66545563757.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609431ba5da26---85543124443.pdf
    • https://hostingyuvasi.com/calisma2/files/uploads/87051823753.pdf
    • http://technoauto.jp/js/upload/files/43616372733.pdf
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/fvp70jjc7c1nepegnhptcmgq79/10546938291.pdf
    • http://hzzxtl.com/UploadFile/file/20210630034842949.pdf
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861eb04e010---4147929306.pdf
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609070aaad948---wigilebofiruwurunidadimu.pdf
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948bb8712a2---87045971100.pdf
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/1cff182e65377ae6dd82721d196dcfe7/80953829421.pdf
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087a01b4660e---11620711645.pdf
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/447de1296a76f8025608c9bac73e4bc8/xadiliw.pdf
    • http://www.orarestauratorisaf.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608b9209f08ad---lekusij.pdf
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d92e76db8d---zofijiwawejelazinoziwejo.pdf
    • https://turbooto.vn/upload/files/84668267754.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c92cddbbe32---41093473517.pdf
    • https://eqonetech.com/upload/userfiles/files/67151647973.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=mtg+physics+today+pdf+download
    • 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_off00010e9f.bin
d10bdd44eb27b6e9ec9b2d8b72de7e0320367ce2764739fd172fd79b51682b70		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9F 18112 bytes
font_01_sfnt_off00013dee.bin
27b3fcfea177e0a7bc5e6fa62a9a283cd916c8bdac8447a533e0a935ac854399		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13DEE 10860 bytes
font_02_sfnt_off000156de.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x156DE 16792 bytes

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