Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f614697a1ea54e9…

MALICIOUS

PDF

81.4 KB Created: 2021-08-20 21:41:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e7a934a9ef6d70c305392fa3dee1b5e2 SHA-1: b6792bcbac37c6528ef883d14d68484c23263f29 SHA-256: 1f614697a1ea54e97a850ffdcb3c1cca8419b8208163c94b338ec61e48765386
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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 http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096de73af736---manawozutoxatimopawofijul.pdf In PDF document text
    • http://ingenermarket.ru/userfiles/pajapidosi.pdfIn PDF document text
    • http://dui-antidote.net/images/userfiles/file/45125663814.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e1aa0ec7e3---mivaguxikusuviwapaxenuji.pdfIn PDF document text
    • https://pearproperties.in/userfiles/file/85869420376.pdfIn PDF document text
    • http://timeyear-v.com/userfiles/file/figakijusekiguta.pdfIn PDF document text
    • http://lexen.ca/userfiles/files/79141185307.pdfIn PDF document text
    • https://biocenfis.es/uploads/assets/file/33236576668.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160921134bcb84---91666991500.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/nuvufisimupumugagowaz.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de0113c64c4---10815532776.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160822f1800330---1295500441.pdfIn PDF document text
    • https://aletihad-group.com/userfiles/files/97706785315.pdfIn PDF document text
    • http://gerd-pollak.de/userfiles/file/14746786842.pdfIn PDF document text
    • http://volamtuyetthe.com/userfiles/file/5387654626.pdfIn PDF document text
    • https://web-sila.ru/wp-content/plugins/super-forms/uploads/php/files/e86a70d0fc951546216ed094b15d29b1/93373793852.pdfIn PDF document text
    • https://jamuiboe.com/webroot/upload_media/3454349143.pdfIn PDF document text
    • http://megat.pl/uploaded/fck_files/file/33368968445.pdfIn PDF document text
    • https://grafitpoint.ru/wp-content/plugins/super-forms/uploads/php/files/348a349be5a57107d5d1bb63458dcc3c/pikujalinugofebakovo.pdfIn PDF document text
    • http://fqcycpa.com/jingkelun/userfiles/files/20210718235618.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/vcu8d3dim7uu7euesflmi8hn95/zesulefake.pdfIn PDF document text
    • https://namlongadc.vn/uploads/news/files/28744264216.pdfIn PDF document text
    • http://generale-bureautique.fr/gdb/files/file/jexojikotilarijawovagenu.pdfIn PDF document text
    • http://famillespourstarlight.com/clients/a/a9/a9b42c05011d3bb27e7f7ec2ed30324f/File/12705813278.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+get+creative+mode+in+hypixel+bedwarsPDF 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_off0000d885.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD885 16632 bytes
SHA-256: 96f6a6f38bc4b2fee969f6e57b3ba183ed70ecea4a598301bf0e754dbcc5120b
font_01_sfnt_off000103f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C0E 11460 bytes
SHA-256: cb7695d93c35895b9bd89ea1ace9c25851c77aaa43c9f6f656941d56b9ef5e71