Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e7f0b82cea5a65c…

MALICIOUS

PDF

82.1 KB Created: 2021-09-07 22:20:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aa8fef1c65d9b8355e82d1249907b507 SHA-1: d02cd9e6ed58c59af1baf7d44cd85bbed052fffa SHA-256: 0e7f0b82cea5a65cab5e9bc6fefccbf0ef76a9e2e24f40b72d780b351180c951
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous embedded URLs that point to various domains, suggesting a link farm designed to redirect users to potentially malicious content. The presence of these URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://synerhu.ru/uplcv?utm_term=hp+officejet+2620+user+manual
    • http://agrobud.net/uploaded/file/mikiwejawano.pdf
    • http://biomehl.com/images/content/files/mupifimegibajipobatix.pdf
    • http://allasclub.com/campannas/file/398953525.pdf
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac7177c672---79372519256.pdf
    • http://retailcop.ca/files/nukosujetegatize.pdf
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/31579e5f520644e3f8b56788626a751e/lugipaduzefado.pdf
    • http://dlshixiang.com.cn/ckfinder/userfiles/files/mujitilateb.pdf
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eef6566ff9---69174214489.pdf
    • http://elosc.com/upFile/file///ITX202109070907523040.pdf
    • http://unseenadventure.com/userfiles/file/6774725724.pdf
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/852fec607d55f29a64a8c7bdaa39a91d/zolitelexexuwatodad.pdf
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/98461009152.pdf
    • http://zpb-maciejewski.pl/upload/fck/file/9668654650.pdf
    • https://stef-nancy.fr/upload/document/72712205621.pdf
    • http://drsuthichai.com/userfiles/files/24571872726.pdf
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/28l6gr554dm4bnnfgku01gb0k6/vezawibaxofimi.pdf
    • http://mellorymotors.ru/admin/ckfinder/userfiles/files/zewulufusukilusobuzipa.pdf
    • http://alicekhenrylawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/61676618754.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078be59081b7---litawowotovinoluvapodosim.pdf
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/56f804bc36aa50eb4bca64380f1c2914/65696720112.pdf
    • 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_off0000d884.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD884 16792 bytes
font_01_sfnt_off0000f096.bin
3ada410b1f7cf914e13f5e1f0965481c3950bfb7a177a0d6fa1d3702f29f4391		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF096 18436 bytes
font_02_sfnt_off000120e5.bin
f551e9941c6179c0e628914162713884a3fd9ba5d17032cf6e6c2cb489422621		 pdf-font-stream PDF embedded font (sfnt) at offset 0x120E5 11272 bytes

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