Malicious PDF — malware analysis report

Static analysis result for SHA-256 93d8c51ef1f0fd46…

MALICIOUS

PDF

85.2 KB Created: 2021-06-26 09:58:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 35668496be5a3c3f8ac7880b95ea19ea SHA-1: 671bf362b84b2dca2f83234b7b81fae4dc263b27 SHA-256: 93d8c51ef1f0fd46ae10449f7462f66e5f5b7e724559d86c38b34cc12daf9540
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many of which point to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • 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.
  • 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://www.emailposte.com/pictures/tajiwemam.pdf
    • https://office-agglo-larochelle.fr/userfiles/file/fekibeserorexoxujupibo.pdf
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/713d2846f356ee6dc96d718ac1357954/xutevola.pdf
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2cfe1d0d89---vadibobomekitu.pdf
    • http://changdahk.com/upload/76051603924.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160933f3d11305---diweti.pdf
    • https://creativesilhouettes.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16093e6785fa9b---36198457817.pdf
    • http://ccswcd.com/userfiles/file/6086024609.pdf
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/03qulvl7supgopn12kc4cggj05/77267904029.pdf
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/a9984e3c4bd4be4847c9faa2eb9d3ed0/bofofakenenuzomuvewaz.pdf
    • http://bigpictureresources.com/userfilesbigpicture/file/mesosuwinugojifuroviz.pdf
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/3f2f8a8506abf5cca3147d983184b3f8/faxowavelosole.pdf
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/bdvnstkdlh5jorde1ipggku09c/kuzalaral.pdf
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/abd57e08cf1c618e75d9fd8f26563b90/99869115657.pdf
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/8novi08a73ej3ac6s16is8ifm0/xukebofumefirilotizak.pdf
    • https://fertilizergranulatorprice.com/d/files/movazabe.pdf
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/b274a3a436fb4b08ee34c98a31f5f06e/mexulikesomafugamaxu.pdf
    • http://oldtimerclub-thueringerberg.at/images/file/54404753858.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/5n74s2h3gk53icktaslii6rua7/nutofelowisofok.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606fff0d39bf1---554091851.pdf
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a2222ce010e---47317147593.pdf
    • http://tropo-design.com/ckfinder/userfiles/files/71593835158.pdf
    • http://kanchanaspa.com/ckfinder/userfiles/files/nefonemofu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=charli+and+dixie
    • 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_off0000eac3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC3 16792 bytes
font_01_sfnt_off000102d5.bin
40ff027d4fad2cf0785c680585c942569f049961ae310a2379339d010faa65f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x102D5 17332 bytes
font_02_sfnt_off00013004.bin
73a2745f647a02c6140b13d2ce8fdddba7086141449f50c2a1986e041978de95
pdf-font-stream PDF embedded font (sfnt) at offset 0x13004 10092 bytes