Malicious PDF — malware analysis report

Static analysis result for SHA-256 70419f7e09f38690…

MALICIOUS

PDF

86.1 KB Created: 2021-07-16 14:37:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9dce2298994eec309ac779eac2a8d7a9 SHA-1: 99e6d3116e0eede2ceadf815f16ea1868bb7f49e SHA-256: 70419f7e09f386907041a7c0c74488d82f2fc15a7dd2c0d6dc8d2528440b0146
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing users to multiple websites hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of numerous links on potentially compromised sites suggests a broad distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/a770983e6af38f72c1080857a0b560d6/63104843842.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a21b5decbba---63600149302.pdf
    • http://shuswapladystriders.ca/userfiles/file/49298205380.pdf
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160931037154c2---14914378059.pdf
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c34c74b7f2---jizujo.pdf
    • http://studiocalderini.it/userfiles/files/33949842868.pdf
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160c36ddc87cfa---63346949281.pdf
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/fa4f7ddb4a17e9239407d7d02ba0f938/24057340577.pdf
    • https://bostoncake888.com/UserFiles/files/wiwobewalazug.pdf
    • http://alnadaoil.com/userfiles/file/zozimuwato.pdf
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/8db58e0203c3599ed443a0daae373671/vadevorefetafu.pdf
    • https://a2designbg.com/userfiles/file/58309307131.pdf
    • http://sanzmendia.com/userfiles/files/78736516696.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609585fca0cca---85915703634.pdf
    • http://eyupsifalibitkiler.com/resimler/files/3016443070.pdf
    • https://retentionstudentexperience.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a303f0b2398---kotedovuzaf.pdf
    • https://aimhc.com/userfiles/file/sodedarolifesesiwogagisi.pdf
    • http://opakowania-loga.pl/zdjecia/fotki/file/96209179254.pdf
    • http://highlandcougars83.com/clients/2/26/268573c5102cd00412bac87cee9346ec/File/99973574347.pdf
    • http://pro-elec.ru/ckfinder/userfiles/files/14048185579.pdf
    • http://anhuizpyy.com/upload_fck/file/2021-6-24/20210624075707716863.pdf
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609118c212e07---60393946626.pdf
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16091afce3bb78---gibujejogiruzeburejujubut.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085448b4993a---88379448064.pdf
    • http://fsoa.cn/userfiles/file/16187514318.pdf
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/53bb2868faadff65dc7663c94b79dfe1/90390911830.pdf
    • http://614move.com/clients/4890/File/marifufo.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=english+easy+stories+for+beginners
    • 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_off0000edf1.bin
4dad219b05d4e08dce7833d73ce32eb47be5e423a7505d1cf6a120723658687e
pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF1 10728 bytes
font_01_sfnt_off00010686.bin
6e8a57dd311fd074d7c380f6fbfd38d40625dcc2d9aed36625343f0546cc8464
pdf-font-stream PDF embedded font (sfnt) at offset 0x10686 17064 bytes
font_02_sfnt_off000132c2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x132C2 16792 bytes