Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a2dc0ea6ad5d888…

MALICIOUS

PDF

77.3 KB Created: 2021-06-27 23:50:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 20a5ae320b0d8f70ce3f27124a23de25 SHA-1: e1187592dfd64651afd948af698b35e83e3daf0b SHA-256: 1a2dc0ea6ad5d8886428a625bd39dcdde9bf7583a413870d0d97b8e46c48f5fb
156 Risk Score

Malware Insights

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

The PDF document contains a large number of links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document's structure suggests it's designed to obscure the true destination of these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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://hogies.com/includes/template/uploads/file/kapagivegatewuligafusom.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdcdbf64b1c---91307993002.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1608751b27a13d---rakajefefamoleturepajepix.pdf
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/dd491951db187ad04f8339cfa31ca61c/12606009107.pdf
    • http://kondicionery-ivanteevka.ru/upload_picture/file/99323595268.pdf
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/j9i0fkku80bt825eccc62g5sos/47307785553.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c08dabcc826---xavove.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/d09ba712fbff192ddd1f27c9d71588a2/mofuzaworiju.pdf
    • https://pablohernandes.com/wp-content/plugins/super-forms/uploads/php/files/d27dac741f187950231e6dbb8601ec1e/dajamosedotap.pdf
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc0847a17d---92695138565.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160b73e5de73ec---85091316878.pdf
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/282335cd9868d89f529369707404cd36/zufake.pdf
    • https://jollytime.ru/wp-content/plugins/super-forms/uploads/php/files/674557cdd0029e860c51a24be535dc40/10253824132.pdf
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb71cac3d1---65429306847.pdf
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/c62ca59057fde165c876268115bb343b/jofaxunijubajarukur.pdf
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b90fcc545f7---buwegafezovigakib.pdf
    • http://dulichtantai.com/files/uploaded/files/59206411182.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a163f02cbdd---zapeguxuvafaja.pdf
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/4609860751.pdf
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4c069d99d---pogebidagiv.pdf
    • http://firmykominkowe.pl/Obrazki/edytor/file/dolomirutizegenowaxogek.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/r549m3adsmhk0kt4kdg8rjuf1e/rerogulofukurividutiwixi.pdf
    • http://wabasnb.com/files/fckeditor/file/14622088760a78d32237c8.pdf
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a740a748ce---58470686374.pdf
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16078a69c564aa---vazuwipefewatukasowerigu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=best+sites+to+watch+malayalam+movies+online+free
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb24.bin
a40870927b9dd418101a8b9f5730f53293aae915691c222edd8f581f99c09cfa
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB24 16620 bytes
font_01_sfnt_off0000f64f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF64F 16792 bytes
font_02_sfnt_off00010e66.bin
46c4652d2a08d845c0a9848ec04027254505c8db642d5945276c2f1f2ad694b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E66 10920 bytes