Malicious PDF — malware analysis report

Static analysis result for SHA-256 d896094cbef661da…

MALICIOUS

PDF

90.3 KB Created: 2021-08-19 04:05:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 5730f58e46975daf2691534bb2433c31 SHA-1: e56309245c1ac9ddec5a08b7df7e66d55cdd79e7 SHA-256: d896094cbef661da058d28e399ddea97f8d7f870c3505152058dcab4bdeeea01
164 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to compromised CMS uploads and disposable hosting, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of a visual download button further supports a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160aa331c53cda---wodojonunodarixelamokeke.pdf In PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b95dcbed4e844c5ea41701a2f7dc0be8/46359443162.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/c157a0124cad6636ffd1dc1269570a98/86259995456.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160ba7f0e7c536---67302811831.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160a649faacc78---jajuzinizivokitefarakewux.pdfIn PDF document text
    • http://cameralehiep.com/hinhanh_fckeditor/file/vupudopumafugitipeb.pdfIn PDF document text
    • http://exhibitionchannel.com/upload/sutidino.pdfIn PDF document text
    • http://tnslib.net/userfiles/files/43210921018.pdfIn PDF document text
    • http://www.allatpatikapecs.hu/images/file/jotofotijagif.pdfIn PDF document text
    • https://liantoong.com/archive/upload/files/kazusubemilugidobupijik.pdfIn PDF document text
    • http://balone.net/_upload/file///72088469567.pdfIn PDF document text
    • http://harasim.cz/uploaded/files/71463676254.pdfIn PDF document text
    • https://trungtamgiasuhcmmq.com/uplaod/quangtri/files/zenuwinumowajujupo.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b0de815f2---tidelafefugojepafepi.pdfIn PDF document text
    • http://tevukasveza.lt/ckfinder/userfiles/files/nibobomamaweb.pdfIn PDF document text
    • http://oinworkshop.com/clients/6/6d/6d9161a7191ba42f41383a85782e2f4f/File/juwanizazudiderapusozaw.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/3df82fa6c32a1183adfcfe0d39617f36/fekimanojedef.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/84169783592.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160b48c87f22d8---terarisuzuxibafalor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=coc+trip+game+clash+of+clans+hack+download+for+pcPDF 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_off0000fc50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC50 11276 bytes
SHA-256: 722edb9ba779d271fd70bb32ca7f42d89e18ea769218973a05fced26b69e6e7e
font_01_sfnt_off0001167d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1167D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E8F 16984 bytes
SHA-256: d30198a0625b9410d2f94ca276bd5220db9e9dfd07428e3e354cf101eaf8f4fd