Malicious PDF — malware analysis report

Static analysis result for SHA-256 8067e57c48a08a91…

MALICIOUS

PDF

85.5 KB Created: 2021-06-27 12:10:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 01e6d43d25d6c97025b88b27142dd120 SHA-1: bb8a4048a13ca8e84f75f1ffc33be443461ebce9 SHA-256: 8067e57c48a08a9198ee07ac5d681efd6ba27f8a4ce1ab18ad6b7dfd726dd52d
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many hosted on compromised WordPress sites, suggesting it's part of a link farm designed to distribute malicious content. The 'SE_ADVANCE_FEE_SCAM_LURE' heuristic indicates the document's content is intended to deceive users with promises of prizes or funds, a common tactic in advance-fee fraud. The ClamAV detection further confirms its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • 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://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae00b2cec6---mekezapugegotodeb.pdf
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/fe61c2e020accc635128d6963f436ac7/92039353290.pdf
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/ee32dd6a76cb258234c6cefb756a6d91/nivigukevikugamidi.pdf
    • http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160702dca8233f---10431120680.pdf
    • http://assushop.com/userfiles/assushop.com/file/luzinowosiwej.pdf
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/2656a20dbf050ae91607876ed413c451/fipagokakowazikixidufoxiw.pdf
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/ropalovevanotadajaxezebi.pdf
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/1bbk3r0plcdccntvu9d7r8stui/guretokesigimabujoxija.pdf
    • https://rocksoliddesigns.biz/userfiles/file/jerutalixamomevunudawu.pdf
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a7143c236f6---69772732163.pdf
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/l0ccrjlh4pu4soclr1gto5iauk/59851135822.pdf
    • http://thegreenlegacykeepers.com/clients/e/e8/e8dc17949b7ef813e9937e453902477f/File/90362840479.pdf
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/403ea17e28c9306bb89bcc944edd75f4/72700627872.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609a34900efcc---pogirasenafilidomabog.pdf
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ea97394690---40124503204.pdf
    • https://bodymason.com/user_uploads/files/88732687978.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083de87a7f9a---nolujuxefosu.pdf
    • http://archimax.ch/dynamic-images/cms/file/tifokufagopipazupunaje.pdf
    • https://kisikana.hr/userfiles/file/19999786646.pdf
    • http://ambulatorioveterinarioscapindandrea.it/userfiles/files/tobinalebalisekobupidujog.pdf
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/41b2a1535f42aa2f524c41e098b6179e/fixefitimetanurupew.pdf
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/57d8ecfc9f5e1a9735cc58fe196dc91a/jexaxufowepepujunitaseji.pdf
    • http://zge-led.com/luodan/images/userfiles/file/sepojuzilizixexixetekuvog.pdf
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160831e768ad31---xewukeza.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=2nd+class+english+book+solution
    • 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_off0000e8c7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C7 16792 bytes
font_01_sfnt_off000100d9.bin
ac7902fd28cc9fb1199dfcb9bbfe3b18f27775a0615f2b8a213e74e5997bc134
pdf-font-stream PDF embedded font (sfnt) at offset 0x100D9 17404 bytes
font_02_sfnt_off00012e42.bin
98a1cef4a7e81864017eaf1e643270ce2867dbad25a407dcc9758a9301d326fc
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E42 10904 bytes