Malicious PDF — malware analysis report

Static analysis result for SHA-256 7800f25e0687e9fc…

MALICIOUS

PDF

78.8 KB Created: 2021-07-02 13:55:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: a615cfe64db9beda4f808b0b8767ed4c SHA-1: 9bc5075b01f2c69fde9b9d871924b6052431ee72 SHA-256: 7800f25e0687e9fca42ac65e4360a00060c4abb51a1d845553c55bea50960806
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://infrive.ru/uplcv?utm_term=indian+summer+mp3+download PDF link annotation
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160879b062614d---rerekuxidiwod.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/871ote2u9q4hmdgofn0npoer36/92124271561.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608951b8989b8---kumul.pdfIn PDF document text
    • http://musiclivemarsala.com/userfiles/files/rexaxo.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1608dca1435fd5---26305242451.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608e87e8f0f22---jonaven.pdfIn PDF document text
    • https://medosojewellery.com/userfiles/files/46216858169.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/qmirgvoedfequ4c5esu89k72ln/tewowebatoxagew.pdfIn PDF document text
    • https://teenvolunteerhouston.org/wp-content/plugins/super-forms/uploads/php/files/bdcf6cacfc407d462c0257416f4dd06e/vemajepidibawonavad.pdfIn PDF document text
    • http://omak1968.com/clients/71178/File/86178534891.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d89c74e36d1---92903662566.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af08d4c6ae---bopelebunidupo.pdfIn PDF document text
    • https://garyjetcenter.com/wp-content/plugins/super-forms/uploads/php/files/ab35e034f2e3554c52374bb19f2c7c2b/bigosolirujebedodenisa.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c25ef58b0f8---jodobiwaxokosufawa.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607503dfb46a9---95555063996.pdfIn PDF document text
    • https://otelnamore.com/wp-content/plugins/super-forms/uploads/php/files/cec065fc836dcf0f5226e12c149d2486/lepibimidexatisu.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087778dd3a6f---16732854865.pdfIn PDF document text
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a319839e510---levukavunos.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a31a822501---90256736867.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a7026732db---25594933371.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/923752e3c344f8256cbe1ff67aa3848b/nebibagakirebalesox.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/9942e750e63675ce4d173867d696bb8d/13558049323.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/8h15ageg6mkpl74taqlvhuegu6/55750051040.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/xepalaneketuwosoguvide.pdfIn PDF document text
    • http://canphantich.net/Images_upload/files/83015832407.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160811b8ba7dbb---61329001285.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cdc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC3 17992 bytes
SHA-256: 5b298594199402062c41c854597a52dcf1f59d5825d902bfc78198bbeb7a5131
font_01_sfnt_off0000fcb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB7 10764 bytes
SHA-256: ff9fb0c915acfe78570936abeb85a169d16faf7fab2c2357bba75fdc7c91a3f9
font_02_sfnt_off00011577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11577 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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