Malicious PDF — malware analysis report

Static analysis result for SHA-256 e116a669c1550107…

MALICIOUS

PDF

99.0 KB Created: 2021-08-09 20:16:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5ce4c0d838b9a5a2b99f67aa9d0b1339 SHA-1: b3911b6cfc793e547c7af332b8b5c09f16677573 SHA-256: e116a669c1550107055f874786ab02be6256d1497adb1f74ccac30ab4eeeb12d
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users to malicious content. The 'SE_CALLBACK_LURE' heuristic indicates a phishing pretext, likely related to financial matters given the 'unclaimed property' theme in one URL. While no scripts were explicitly extracted, the presence of numerous suspicious URLs and the ML classifier's high confidence score point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • 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 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 http://euredit-editions.com/userfiles/file/37403076782.pdf In PDF document text
    • https://upbfassadenbau.com/upload/file/90703161933.pdfIn PDF document text
    • http://popnmusic.fr/userfiles/file/51759454364.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f4035dcf97e---paxekefanolomuv.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1607db00ced25f---71270633045.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/e73e86af1d5cb415269d8e64a80dd080/41642103458.pdfIn PDF document text
    • https://inchiriereelicoptere.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16079aa9cdeff1---godixijevef.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cdbc5012cb1---nifapodapu.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0vl1dnhrq78fe8em9k758hpa76/nakowej.pdfIn PDF document text
    • http://saiprogetti.net/userfiles/files/59831291133.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/1e355e9be33d8e49d687ef7052b83325/lizuxuzojosajebozak.pdfIn PDF document text
    • https://radio-aurea.eu/files/file/41756811861.pdfIn PDF document text
    • https://wegofa.com/userfiles/file/27243841229.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a048705c13b---nuvebunisubanozeso.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a06b663fb51---75339397301.pdfIn PDF document text
    • https://sanaspinler.com/calisma2/files/uploads/zuremifarufarikomuwilitet.pdfIn PDF document text
    • https://bahia-group.com/ckfinder/userfiles/files/tumob.pdfIn PDF document text
    • https://elbag.net/wp-content/plugins/super-forms/uploads/php/files/bad228378456b9996d9f43cddf95a12a/wuwuvetutajiri.pdfIn PDF document text
    • http://megalabsrl.it/userfiles/files/39290681819.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/kchq249tkfn3j13l8cau9sul71/soxavu.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3ef89c9b8e6dd4478de95af249927a30/11979837813.pdfIn PDF document text
    • http://crm333.com/documentos/file/moxexixojixamuso.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=unclaimed+property+fund+new+york+statePDF 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_off00011dfa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DFA 11180 bytes
SHA-256: 1d15d0be1a75ef8cae9e6d1ce8aacda0f07b88e0a99f7c46fbad0b29a7c0395e
font_01_sfnt_off00013834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13834 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15046 17420 bytes
SHA-256: 5e03a1bff7f159d9489cbd27ba5bbe24cfb289c5a15ca25b53dc499cbcd4d3bd

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