Malicious PDF — malware analysis report

Static analysis result for SHA-256 032c8dd4cff9aee2…

MALICIOUS

PDF

84.8 KB Created: 2021-09-20 08:44:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7f08c50c7460ea9d0547eac6139eafc2 SHA-1: 9a94835f09e1cb6b8b1a93670a4133789b8e9605 SHA-256: 032c8dd4cff9aee24b2afb4cf565c0b574b4a3cb4b2acd344e25e6462cc7ea76
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by ClamAV and an ML classifier, with heuristics indicating it's a link farm and an advance-fee scam lure. The document body, though heavily obfuscated, likely contains deceptive text related to prizes or parcels. The numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting, suggest an attempt to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 7

  • 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.
  • 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://besttailor.info/ckfinder/userfiles/files/miravisofusobinibewawur.pdf
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd07e1ec9b---58491074437.pdf
    • http://magiepourenfants.com/images/mediamanager/file/kakasud.pdf
    • http://thai-apsproducts.com/file_media/file_image/file/zogosorifok.pdf
    • http://pincodehub.in/userfiles/file/vakoruwoma.pdf
    • https://www.paseppe.gr/ckfinder/userfiles/files/41251163868.pdf
    • https://cometsecurity.in/admin/userfiles/file/461497759.pdf
    • https://prosaison.fr/userfiles/files/texedimudozizisadivo.pdf
    • https://www.prshots.com/ckfinder/userfiles/files/55747876195.pdf
    • http://servis-hradec.cz/files/file/gizis.pdf
    • https://rizecanreklam.com/images/file/93635391501.pdf
    • http://www.cottagegrad.ru/files/file/misevanefexonizi.pdf
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/f000e01519a8c8be44cbdcc69ef80264/sumuwelexaxutunogaruwolif.pdf
    • http://yejida.com/userfiles/file/moxatorizijofuxanekujuvo.pdf
    • http://khautrangkhangviet.com/upload/img/files/11213881970.pdf
    • http://vers-ma.de/userfiles/file/vibesatetagelixanufoxok.pdf
    • http://foodzipo.com/uploads/userfiles/files/lipuropedofidame.pdf
    • http://akademibt.com/resimler/files/suvupukudovoxol.pdf
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/54698043210.pdf
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/a71bea84cbbe58de06b89ddbf921dea8/87088995774.pdf
    • http://astprom.ru/sites/default/files/file/30736571402.pdf
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/v621uhu0chchroq40qgb6tjc2g/vidafesenazumov.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16147f7d223784---53033059213.pdf
    • http://sochi-polyana.com/ckfinder/userfiles/files/93192460236.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=how+to+crack+wifi+password+using+android+phone
    • 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_off0000e5e0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E0 16792 bytes
font_01_sfnt_off0000fdf2.bin
1dfeaf00c7353ffe93c3bf692f53bb5dd61098a0f6368306346eeae516157784
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF2 17620 bytes
font_02_sfnt_off00012c13.bin
9ba2f98bfd1c51c3038e73fa2d6626ccb14defd21c1c9a65001f902a58b55f7b
pdf-font-stream PDF embedded font (sfnt) at offset 0x12C13 11124 bytes