Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfee0a2e39fa5663…

MALICIOUS

PDF

83.6 KB Created: 2021-09-01 11:34:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5af6bc376ea3ccbe039b202cfef8be0c SHA-1: dae1a987690e3f00ee112b1d4a04ae8a8d47f5d0 SHA-256: bfee0a2e39fa5663b351bee1081fa9a09fb54a89c68f861257e9b408dcfe99a0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing or trojan variant. The document functions as a link farm, containing numerous URLs that point to external resources, some of which are hosted on compromised WordPress sites. The primary purpose appears to be directing users to potentially malicious content or phishing sites through these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

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
  • 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://mbamantra.com/ci/userfiles/files/881175669.pdf In PDF document text
    • http://staractivecollection.com/resimler/site/files/xepexitufowow.pdfIn PDF document text
    • http://www.arborvitae.cz/ckfinder/userfiles/files/tewovazewexevisobutojoli.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a2db59572d2---tuzok.pdfIn PDF document text
    • http://schokobrunnen.com/idata/safugagumudovuroxevu.pdfIn PDF document text
    • http://sriraghavendratemple.com/ckfinder/userfiles/files/kenijanapipuxelafetom.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/27719586911.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/5a1343bfc6a2fbdec8acc8f2f0de065d/vomuvonowi.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f7f4a51c515---74259136559.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/f33872adc19d031bd9308919e473637b/pifilelok.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f5d233103---tegipomekutipab.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/a37dd54f29d100bfb53459af54b19cda/4910629451.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b622e0dfefb---77249527466.pdfIn PDF document text
    • https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/36745992237.pdfIn PDF document text
    • http://gt-outillages.fr/ressource/site-image/files/16235505081.pdfIn PDF document text
    • http://soleilboo.com/images/uploads/files/lileloxerivodabojoruzulaz.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd16073a71---zunuzisokuzidaterelixa.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5bb32da6ee---50405362602.pdfIn PDF document text
    • https://estatecambodia.com/htdocs/cljr/data/files/87800563524.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160a1a1cb1edb6---voboxesudimopa.pdfIn PDF document text
    • http://myafmc.com/clients/a/a5/a51d49d85de18111a3d718c63a5e5081/File/lutozovuzimip.pdfIn PDF document text
    • http://feynburg-uhren.de/uploads/duxafijixekevizofom.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b13380ddbde---todagobigiburuxib.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c95718305a---vijosipewulalowume.pdfIn PDF document text
    • https://eprobatdz.com/ckfinder/userfiles/files/14931641495.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=pictures+related+to+chemistryPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e38f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE38F 17080 bytes
SHA-256: 4963ed107ede9cf03b80087a117f1283a5dfd672fe9b8313fdf5d2bcc30e1bd6
font_01_sfnt_off00010f0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0F 10744 bytes
SHA-256: a7ade0f12c5720dd6317792c0062711c8de6a100d2690b74cd05097bad70b94f
font_02_sfnt_off000127db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127DB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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