Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd05314ae7fcb87f…

MALICIOUS

PDF

167.0 KB Created: 2021-07-04 22:58:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 75cd10af35b2f82acf868393063f6c9b SHA-1: af5561a17e76914e053ca2a4a803f8cb5018150b SHA-256: fd05314ae7fcb87fb450e5b22acb26c48baf7034bd23bcb4dbf68c86b78100d7
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised websites and disposable hosting, suggesting an attempt to distribute malicious content or phish for credentials. The presence of numerous external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicate a strong likelihood of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9776

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://htlexpress.com/ckfinder/userfiles/files/98340845900.pdf
    • http://puzynowska-kancelaria.com/userfiles/file/banujemafa.pdf
    • https://remoteyourstaff.com/calisma2/files/uploads/37397992413.pdf
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160747f0fb6765---fizigi.pdf
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097408ce2d8e---menitelipos.pdf
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/ut35atg068nnmmh47omobu4vlh/47608935054.pdf
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c4052a72877---71391965106.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081f151a7de0---ramomamabedudiduroze.pdf
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160776bc7b87fa---ginezolobegagegonef.pdf
    • https://moto-trend.cz/public/files/fck/file/89337203732.pdf
    • http://qiangka.com/ckfinder/userfiles/files/xajewaxokowik.pdf
    • http://inglewoodreunion.com/clients/68690/File/dunezekewepabag.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7ea1484e84---nijebonusuvupokuvugo.pdf
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/5d043477873b09424c8b1a4e675f18c0/69316642689.pdf
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607dc8c9d754d---kaxag.pdf
    • https://dm288.com/slicice/file/35811797457.pdf
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5de3553cc---lasemusipabatarunako.pdf
    • https://www.andrecampbell.ca/wp-content/plugins/super-forms/uploads/php/files/48b284211a87a436d4a8423008844058/98714375311.pdf
    • https://manajrgvaaradhi.com/cms-uploads/files/pilorowutifudevupifewiren.pdf
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/1ce474a3f04a84207f9845532f706466/mexavikokifad.pdf
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160754475c2e5f---xotebuvexawopabemudaxiwu.pdf
    • https://dolcezzecaffe.it/file/velipuguvaramexadamupojo.pdf
    • http://banhangcongnghe.com/upload/FCK/file/60360893244.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=magnetic+field+on+a+current+carrying+conductor
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00020a33.bin
d49cd2e1dfe18d5feeb756d8c64acc27085e230f40cbffde8991e7cba9eb10cf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x20A33 16384 bytes
font_01_sfnt_off000220c8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x220C8 16792 bytes
font_02_sfnt_off000238da.bin
d99a0f9c63a9d864f04398d08a11039fb2f0aa9d103ee34a38bea35071c89026		 pdf-font-stream PDF embedded font (sfnt) at offset 0x238DA 22492 bytes
font_03_sfnt_off00027478.bin
364d437168028ff40cb3711c2179c23b475cb1bd7bbcbaccd715a7cfa77a5f05		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27478 10688 bytes

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