Malicious PDF — malware analysis report

Static analysis result for SHA-256 74fb614eb9612216…

MALICIOUS

PDF

78.5 KB Created: 2021-09-08 23:34:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1a5582b944ccbe2cd58a01d1655fa336 SHA-1: c62178a9bf71aa5c5675874e21dd5dec77c0da43 SHA-256: 74fb614eb9612216979671382e76075c641aa29d857892c1dbbeda9f1319e0e6
304 Risk Score

Malware Insights

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

The sample is a PDF containing embedded JavaScript, which is often used to exploit vulnerabilities or redirect users. Heuristics indicate lures for recovery secrets, payment redirection, and password-protected archives, suggesting an attempt to steal sensitive information or facilitate financial fraud. The presence of numerous external links, some pointing to compromised WordPress sites and disposable hosting, further supports a phishing or credential harvesting attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 10

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://asid.rw/userfiles/file/3466521532.pdf In PDF document text
    • http://chinawin-consult.com/userfiles/90165272558.pdfIn PDF document text
    • http://www.ufolep-69.com/contenus/files/76049058767.pdfIn PDF document text
    • http://sireny.net/share/files/84702271341.pdfIn PDF document text
    • http://chaukitchen.com/uploads/files/46778213692.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/2b0312aa9effa754d983a7e6e9a38222/21785177139.pdfIn PDF document text
    • http://bonfiremadigan.com/uploads/fckeditor/file/82831130323.pdfIn PDF document text
    • http://sdes.in/uploads/44310949782.pdfIn PDF document text
    • https://terracetemayonetim.com/upload/ckfinder/files/muzupukejupanukomig.pdfIn PDF document text
    • https://rentcar888.com/uploads/files/202109062127526780.pdfIn PDF document text
    • https://naveenent.com/administrator/imagetemp/file/xukunakidebubatatelas.pdfIn PDF document text
    • https://everestart.com/images/stories/file/55097353344.pdfIn PDF document text
    • http://retailcop.ca/files/newulebewub.pdfIn PDF document text
    • http://jamalcar.com/userfiles/file/zusoleredokaxilefab.pdfIn PDF document text
    • http://www.mananthavadynorbertines.org/www/js/ckfinder/userfiles/files/rukimaloxapije.pdfIn PDF document text
    • http://buren-kompanie.de/userfiles/files/xawebufisazinex.pdfIn PDF document text
    • http://www.pacautomarketing.com/file/werafudujezejowot.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613552f21bfd6---lomolawe.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/16135c1d920026---luneginaselev.pdfIn PDF document text
    • http://lexprikson.com/admin/style/images/userfiles/file/78237959178.pdfIn PDF document text
    • http://uceng.net/_UploadFile/Images/file/bogifis.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210904095244885.pdfIn PDF document text
    • https://www.tai.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16133c28b7a518---85337273026.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613711a54f142---vinaliwoginijexunagunapi.pdfIn PDF document text
    • http://gaudi.tw/upload/file/jewozusidifan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=how+to+lock+notes+in+androidPDF 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_off0000ce1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE1F 17752 bytes
SHA-256: c40e268e5cb954c6e17942cb2ebde35554d73404272ffe3fd375e8d81b788ead
font_01_sfnt_off0000fbcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000113e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E6 10532 bytes
SHA-256: 2dd71befe28314f4d927bbb347163f0008010b893086cf67a46060954677e9d3

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