Malicious PDF — malware analysis report

Static analysis result for SHA-256 e78ac7383b36271b…

MALICIOUS

PDF

104.1 KB Created: 2021-08-09 18:57:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 67b890a1277b952afebb894216be8d44 SHA-1: fb96557f2cecab508a699a56f0c4edfe17ab7af7 SHA-256: e78ac7383b36271b42cfa66cd4d2417cd9365f1acbfe0cce7f16832e7eb3065f
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous links pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9322

Heuristics 5

  • 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
  • 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://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609859fcdac5e---zuladutagozoxubulemo.pdf In PDF document text
    • http://cungcapluonech.com/upload/files/55576938838.pdfIn PDF document text
    • https://watertorens.nl/userfiles/file/98284407616.pdfIn PDF document text
    • http://xn--42-jlclgg6a3e.xn--p1ai/userfiles/file/19915670930.pdfIn PDF document text
    • http://www.wm-meyer.de/meyer/admin/editor/ckfinder/userfiles/files/ronotoresabikeg.pdfIn PDF document text
    • http://elosc.com/upFile/file///ITX202107212042458455.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/4fc75c1766c1759ad78086f148938e89/5138758621.pdfIn PDF document text
    • http://klefmarken.se/upload/file/molilokedavabujo.pdfIn PDF document text
    • http://www.umadai.com/ckfinder/userfiles/files/zenawuvareze.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160832024545d8---wosipuxiselipofub.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f9bfbc727ef---kofaxininovisu.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a05c56a5a55---88483171882.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c4606b3c629---10482613544.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/qi6oe0248v1d9gdahda70vjo5r/54822459280.pdfIn PDF document text
    • https://ddnepal.com/assets/userfiles/files/68099815159.pdfIn PDF document text
    • http://hglobaltour.com/FileData/ckfinder/files/20210615_77E2D33ECA2C419A.pdfIn PDF document text
    • https://pellevah.com/upload/files/xezoneridoj.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/633047593.pdfIn PDF document text
    • https://www.lucaslobker.com/minor/ckfinder/userfiles/files/vefatexomigom.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/83b863e8b8008979bdfd83aed82fa5ea/ribuxilagivajidog.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160865eaea18f4---wikakefizafijuf.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/rabelo.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16084b6e93d9e6---zojovosiwulavavuwu.pdfIn PDF document text
    • http://first-group.kr/ckupload/files/relofow.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160b89d55e93fa---38031382334.pdfIn PDF document text
    • http://interwork.sk/userfiles/file/ximesizizigi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=yo+piel+didier+anzieu+libro+pdfPDF link annotation
    • 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_off00014522.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14522 10508 bytes
SHA-256: a4612c1a95a844b80fc98197a3dcf9a5bf91681470a24a413d4a6450b0c2b9a3
font_01_sfnt_off00015cd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15CD7 18320 bytes
SHA-256: f5e4f03d3ee909b7375c9c3a13b72d09b0fc8980f4aa763a4219b1a97791c205
font_02_sfnt_off00018b4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1