Malicious PDF — malware analysis report

Static analysis result for SHA-256 90aafc76d418c5d5…

MALICIOUS

PDF

86.7 KB Created: 2021-09-11 02:17:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: cf4264419b505ec867d4cc0588b66156 SHA-1: 6d67a479632a7c9c03a526ea7ffb6af6b3c93dc2 SHA-256: 90aafc76d418c5d5476e9b40f55e5166490e0cf9fe2d8e316355085282f621fb
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The 'SE_CALLBACK_LURE' heuristic suggests the document is designed to trick the user into calling a phone number, a common tactic in phishing and tech-support scams. While no scripts were explicitly extracted, the presence of numerous external URLs, some hosted on compromised CMS platforms, points towards a phishing or credential harvesting operation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://garglob.ru/uplcv?utm_term=how+to+transfer+pictures+from+android+phone+to+macbook PDF link annotation
    • https://perfectsextherapy.com/public_html/userfiles/file/duvedijekaxagabusatakope.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/7208a32a6df0784d58b309bcd0f5334c/17585567070.pdfIn PDF document text
    • http://vetsnab32.ru/userfiles/file/42155954890.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/3453aff1aa80c57e9d81d343a4671730/tewuvukuduse.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613288ee7d04e---66169276463.pdfIn PDF document text
    • https://trisyscom.com/userfiles/file/siziwo.pdfIn PDF document text
    • http://chistogood.ru/admin/ckfinder/userfiles/files/42671136526.pdfIn PDF document text
    • http://cl-metalparts.com/d/files/pikesarom.pdfIn PDF document text
    • https://paulogomeslda.com/userfiles/file/liteposapup.pdfIn PDF document text
    • https://gruntbudowa.pl/files/file/salobadubuvebefobobix.pdfIn PDF document text
    • http://baozhaopharma.com/upload/files/67046825146.pdfIn PDF document text
    • http://marikitaberbagi.com/userfiles/file/70241635328.pdfIn PDF document text
    • http://aquatherm-graz.at/files/kuvigebelite.pdfIn PDF document text
    • http://sake-tori.com/images/library/File/11259010367.pdfIn PDF document text
    • http://halongwave.com/userfiles/file/relakukowo.pdfIn PDF document text
    • http://getdol.com/page_data/file/48622827141.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161391a8944442---banokibesi.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/584ade1e38f3d0999aac63edf60c428b/40501231260.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134d8548efbe---vajisekidukolawuxesasi.pdfIn PDF document text
    • https://themalc.org/files/file/pitibanofal.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/bivibido.pdfIn PDF document text
    • https://www.totalblissbeauty.com.au/application/third_party/ckfinder/userfiles/files/xasevaxafejukifobem.pdfIn PDF document text
    • http://vswet.ru/f/zubabexekizapewudibawebol.pdfIn PDF document text
    • http://klpa.net/userData/board/file/wiliragaja.pdfIn PDF document text
    • 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_off0000ebac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBAC 11248 bytes
SHA-256: 1ace591a3d46a64ebbb0384b1069fed1e6572885b6bfd3f11b54aeab1e73a193
font_01_sfnt_off000105a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A6 18016 bytes
SHA-256: aa81a526878984c566c237778cc0b09b830ff5d8987dd211163f2f2eb2eeb64f
font_02_sfnt_off00013441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13441 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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