Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e02220346c7419b…

MALICIOUS

PDF

73.9 KB Created: 2021-08-14 21:25:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 6be21a59d0056d17d48626d88b5b2f76 SHA-1: f7b756b4a9f6da8e328e512664811ad21c061b10 SHA-256: 1e02220346c7419b01a22ceca3b80e0ecacd831480fa49496bce7997bcdcaece
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a link farm pointing to multiple domains, several of which are hosted on compromised WordPress installations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure and URL targets are indicative of a malicious link distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/317734a9069a3c4ddafed4f92dac98a6/tuvopuboxibar.pdf In PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160e7128d0dead---49024358405.pdfIn PDF document text
    • https://macauroommate.com/ckfinder/userfiles/files/30095873676.pdfIn PDF document text
    • https://lawyerupsmart.com/tempimg/file/91616250039.pdfIn PDF document text
    • https://cqc-material.com/app/webroot/userfiles/files/6271585063.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/10297184277558e42aaf6e34f0d5ea4f/dolefosixeworexinuzadoxi.pdfIn PDF document text
    • http://uctodane.cz/UserFiles/File/ronasadifaleleseguj.pdfIn PDF document text
    • http://sweepinstyle.com/userfiles/file/sedeliwumodogun.pdfIn PDF document text
    • https://gbagencement.fr/uploads/file/32679331183.pdfIn PDF document text
    • http://frigotechreina.com/userfiles/files/63110751717.pdfIn PDF document text
    • http://hidropro.hu/upload/nolezo.pdfIn PDF document text
    • http://jikaramen.com/uploads/files/26582078719.pdfIn PDF document text
    • http://kapsalonvogue.nl/files/file/jomekivuribesanebasimapo.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/5bcbc990db069f9e5cf25b948a14026c/jotusosozasedut.pdfIn PDF document text
    • http://skyline1968.com/clients/74864/File/78091992217.pdfIn PDF document text
    • http://kpdb.org/userfiles/files/nitufezisusi.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/d48c43b76765ebc61389b5c9d39360e8/duxidiwemu.pdfIn PDF document text
    • http://goodwill.pl/userfiles/file/74667789222.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160a5626bf319d---31709489351.pdfIn PDF document text
    • http://delannahotel.com/user_img/file/83293823374.pdfIn PDF document text
    • https://www.casestilistas.es//ckfinder/userfiles/files/jebimifigoda.pdfIn PDF document text
    • http://28777886.com/Lpf/UPFILE/userfiles/files/96080235417.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/a0a7b75b5730b44c8f62cfdab7b95795/19380756208.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=introducci%C3%B3n+a+la+psicolog%C3%ADa+social+unedPDF 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_off0000bbb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBB1 10940 bytes
SHA-256: 271da1047dd1e62798ee449d55bce5fc09b312d5999db046c4388b3e892dd878
font_01_sfnt_off0000d49f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD49F 16860 bytes
SHA-256: fb4611bfe66fb990cd8f20c91d6a332be9ad40609e0f51ae9d38c048584cf453
font_02_sfnt_off0000ff64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF64 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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