Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c6cca7331a92c58…

MALICIOUS

PDF

198.2 KB Created: 2021-07-18 06:01:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2f8290f1cb44943676df4ca8ed274cae SHA-1: dec0f984449d1f62bf298108aee0b3b7a7a66b45 SHA-256: 9c6cca7331a92c584b86daccc4d59844c671b84a2d2ce3dc71878ff7a92b92ad
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The heuristic 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' indicates that embedded links point to compromised WordPress upload storage, a common technique for distributing malicious files or conducting phishing. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8104

Heuristics 5

  • 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.
  • 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://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/ac906a8f546009378ee5ddb40ad64806/viwitutulezomubepevegebap.pdf
    • https://creativitagh.com/pevron/www/img/file/wolukipum.pdf
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160abd16ac94b4---53505609412.pdf
    • http://guides2alpes.fr/uploads/file/loxejafopuwola.pdf
    • http://chinajnbt.com/images/upload/File/25478397499.pdf
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608db45703675---82133355063.pdf
    • http://amfmeg.org/wp-content/plugins/formcraft/file-upload/server/content/files/160abd87a98368---823893623.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ee7b9952cb5---bepizeguviza.pdf
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb861095ff1---pejegedexipumuzaxomidemex.pdf
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/2g56i591o9ro7t2j4u0ji83lj3/36174507476.pdf
    • http://ketoanantamhcm.com/uploads/files/88593982742.pdf
    • http://mega.kz/media/upload/files/60893581685.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c88d05371f---15717561683.pdf
    • http://cascinamana.it/userfiles/file/32072992104.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160837e57bb3e2---33033500333.pdf
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/o204nfvq1m8fnrfmhnv53ub1m1/63249926188.pdf
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0524c1d2d---jefekopew.pdf
    • http://fipjp.com/userfiles/file/14591328636.pdf
    • http://www.parkwaytransplant.com/media_upload/upload/files/76441188609.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/39a926f0c01af1e10aee92bc0f7a4926/jutudi.pdf
    • https://ecole-anglais.com/upload/files/xojazosalif.pdf
    • http://nakakinpump.kr/fckeditor/upload/file/5619975235.pdf
    • http://tuderprogettazione.it/userfiles/files/vuruwiwopiju.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9f69deb958---xukizufozipu.pdf
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071828d3e24f---86025521626.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=is+mary+magdalene+the+sister+of+martha+and+lazarus
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_008_off0002ee6b.bin
39d724b54dd1e6f16a0e608a5178c19cf30f311f2aefe19ea01ba6caddb6f24e
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EE6B 17616 bytes
font_00_sfnt_off00027590.bin
bc81c75694b28e601bd7503bd73da9132290b3fa5dfe08c8fa011da93d26b60a
pdf-font-stream PDF embedded font (sfnt) at offset 0x27590 24720 bytes
font_01_sfnt_off0002b4d6.bin
3a385e4dd4bfbf4849f622134eeb41cd672e0e7ac1b4c2213eb6cb942943407e
pdf-font-stream PDF embedded font (sfnt) at offset 0x2B4D6 1764 bytes
font_02_sfnt_off0002bd1b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x2BD1B 16792 bytes
font_03_sfnt_off0002d532.bin
11847d3eef2c3b0d75d4aaebff94c59c7e8a0303d15ce003cabc560510064d59
pdf-font-stream PDF embedded font (sfnt) at offset 0x2D532 11028 bytes