Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe4b22a9f5b8a1e6…

MALICIOUS

PDF

329.0 KB Created: 2021-06-28 07:12:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7a3a98e70897cbb83cd22b0391907b55 SHA-1: 22d60cd4812f3e4931964d184b781f31d1d33c93 SHA-256: fe4b22a9f5b8a1e6e353a549150971257afef823fcdda209ee9cda8c60fba62d
166 Risk Score

Malware Insights

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

The PDF contains multiple links to external resources, many hosted on compromised CMS platforms, suggesting it is part of an advance-fee scam. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' strongly indicates this intent, and the ClamAV detection confirms its malicious nature. The document likely aims to trick users into downloading further malicious content by presenting a fake prize or parcel delivery notification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8761

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.
  • 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.
  • 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://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160785e0de1e35---61788946647.pdf
    • https://nuttydog.hu/ckfinder/userfiles/files/gonatemakemiriturezutob.pdf
    • http://batiment-tunisie.com/userfiles/file/kokodesivupawotaxolokus.pdf
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/5bbbeba6ba7316247033e0254b429961/dosibel.pdf
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6b7d81ddd---kekarowokix.pdf
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/3f9b18ccc1278ff210cdbfc6369e7fdd/kusav.pdf
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/e0f1fab6eef76c0b414aea32bc4cdf00/mavojif.pdf
    • https://sheenabusesandcoaches.com/userfiles/file/nodegasanolodazobajoza.pdf
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608257d4ab534---8992108176.pdf
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b1755d2f863---babusatiwul.pdf
    • https://afayl.com/userfiles/file/74456814657.pdf
    • http://eko-inwest.eu/upload/file/jenafuvufegerekevita.pdf
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160781e1fabed4---tonorusuxelejuwugibiza.pdf
    • https://implant-drill.com/userfiles/file/26573274699.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/0psvvqfu3md4lqhjmep93vhf91/ronifoxaxugirudomup.pdf
    • http://3gr-group.com/ci/userfiles/files/61346935551.pdf
    • http://sl-light.ru/design/img/upload/file/35388275183.pdf
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/d0dee5b963baed7e8b4b3cfc067a47a5/jopuwefepotewubodejeb.pdf
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/15f9122c2b8f11254924947e60ec12c4/36428012985.pdf
    • https://2acontractor.it/images/file/mufapokesozuravotexixuko.pdf
    • https://nadamasristorante.it/file/gebixelimosofat.pdf
    • http://s8radziejowice-paszkow.pl/userfiles/file/9993834378.pdf
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099e831db816---wizalinotidej.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606d14231f54b---sikimawifafodujoranijenul.pdf
    • https://djennebeads.com/nbloom/fckuploads/file/74778954963.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=need+to+run+an+errand+meaning
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000453b2.bin
7ad6991054111215aba603a9a7bc9c605792a1300a38dfc1a1540f188312e2ac
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x453B2 41876 bytes
font_00_sfnt_off0003853a.bin
7cf5b5926bbe217eb935448f34236850effeb1fea1e06a2956271ffc062263dd
pdf-font-stream PDF embedded font (sfnt) at offset 0x3853A 10456 bytes
font_01_sfnt_off00039cac.bin
1d5b327eb3107cbd20f211f04d3b17eacc9d84d582cd57b13f28d04ab532d715
pdf-font-stream PDF embedded font (sfnt) at offset 0x39CAC 70376 bytes
font_03_sfnt_off0004a01e.bin
a37eba0c018ed4253fe7ce3c45264b48e8b403dcd5f9e9470aa138ebc4eea460
pdf-font-stream PDF embedded font (sfnt) at offset 0x4A01E 45216 bytes
font_04_sfnt_off0004fd4c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x4FD4C 16792 bytes