Malicious PDF — malware analysis report

Static analysis result for SHA-256 63dc10d16ca00c0f…

MALICIOUS

PDF

93.9 KB Created: 2021-06-17 23:57:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: d0259a3955a751cace7810d147cab594 SHA-1: 57de1b8873c55e36e6b6a951fd2332be4872d4c9 SHA-256: 63dc10d16ca00c0f710c8049dc439008f9e58131fb75acfd4cc951d4a33283ff
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains multiple links to external websites hosted on compromised CMS platforms, suggesting it functions as a link farm for phishing or malware distribution. The document body, though partially corrupted, contains keywords related to prayers and application metadata, which are likely lures to disguise the malicious nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/cb13963228539395670a5fc277760df6/98325084372.pdf In PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/0420e3702a0b3a2ad59c1d9d067c5572/40137754203.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609838c85e099---gegipu.pdfIn PDF document text
    • https://rlvanstory.com/wp-content/plugins/super-forms/uploads/php/files/8c30f0d2c8b38433dc33c66a8fa1f0f9/nonixapejebotagawagitazut.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/e2922f421e37a8f11c1476ca14cf4ff1/fegolew.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608e100c33166---6717894898.pdfIn PDF document text
    • http://tipiland.net/upload/file/25668752413.pdfIn PDF document text
    • http://vtvxm.vn/userfiles/file/pumajazuvolaf.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df145d5565---84031052863.pdfIn PDF document text
    • https://adtw1.com/ckfinder/userfiles/files/38842773777.pdfIn PDF document text
    • https://lapalettedesarts.fr/gestion/file/fozibizovotezoxunamezo.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b94f713d9d6---tixosokutafufu.pdfIn PDF document text
    • http://coumert.com/images/file/40896159535.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=santa+muerte+prayer+to+reversePDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001322c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1322C 5196 bytes
SHA-256: a0aa5d9e736f30d5b8e2910c17a7edc508c7eb56809b4c4a7db17e1ae02d3730
font_01_sfnt_off000143ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143CA 11524 bytes
SHA-256: dec825cabc2106185a60124f8621a061366ff13278ea812d80684c01f34fa8ed

Open this report in the interactive analyzer, or submit your own file for analysis.