Malicious PDF — malware analysis report

Static analysis result for SHA-256 193e053592319b56…

MALICIOUS

PDF

82.9 KB Created: 2021-07-01 18:46:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f5da97658833ce597af8ddbed29d8d8e SHA-1: 7617591eba5eaec95c64a696a8be8369fe7dce97 SHA-256: 193e053592319b560477573a2c3e6b6b70da85215fd8639ee40db30e5e61eaaf
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm, with many URLs pointing to compromised CMS upload storage and disposable hosting. The document body is unreadable, but the presence of numerous external links suggests an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://www.advokat.com/app/webroot/img/fck/file/xomonenilinavu.pdf
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/91624ae08c7000ea8461040a6da1f6e8/24926587510.pdf
    • https://angel-juicer.com/FileData/ckfinder/files/20210606_2159D281896447D8.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bb7059636cd---movipigasaguvikevumewafu.pdf
    • http://france-ex.com/images/blog//file/58739020565.pdf
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/792070fd1fdced77bfbb5ebf7546cb94/wufudinokubaza.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f12f5600551afb6403f0649db178d526/dipojafaza.pdf
    • http://www.firengo.com/userfiles/files/60641443633.pdf
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/d1a2f429923d1cfbea3d32ca178fcca2/49303825415.pdf
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608424b2d84f4---fidizatajurov.pdf
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/7bb15ef86361561f7233b81f76cd2de6/9540636418.pdf
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073f4e7dd35c---76857450194.pdf
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/635e98a983e59f1eb6308f292d9be0ab/nulokazidozivilekitotini.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160702577a7f0f---36253883844.pdf
    • https://photographerin.agency/wp-content/plugins/super-forms/uploads/php/files/9ajopof9ate3mb1olajtf70gn3/lukilafu.pdf
    • http://absolutelyneon.com/userfiles/file/bobuvewebozuzi.pdf
    • http://bendhorseride.com/userfiles/file/45613766942.pdf
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/fa98c87b5e7d55fe200212738b20633e/748476256.pdf
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/dfd1dd03c94cdd2eb2a2f88287490b6e/fagusubosabozomodu.pdf
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfd239f158---talenagadavovuna.pdf
    • http://essuances.com/ckfinder/userfiles/files/gibijevadorozejo.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/ole32d9u1hrv72mnkqg2p3hloq/55052135792.pdf
    • http://geoplan.su/userfiles/file/56373369316.pdf
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/rm6lok4veot8e8ulbq8nklm2o9/43887450241.pdf
    • http://kevinmcallisterlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wagujefapuxeriniwebakuzo.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=love+is+for+all
    • 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_off0000e3cc.bin
7ea90036ce49fc28392ece410923a89b73e0129a89ed8e7ff1c95e5ec1c0dd8b
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CC 16968 bytes
font_01_sfnt_off00011023.bin
7ed2bcefa8931cc215e80bc3491a91e2c646f5ed0921611407495854adb4c775
pdf-font-stream PDF embedded font (sfnt) at offset 0x11023 10028 bytes
font_02_sfnt_off0001268b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1268B 16792 bytes