Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2d8180e05817f11…

MALICIOUS

PDF

85.9 KB Created: 2021-06-26 00:00:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 91ad29c3821221b3d242a407883e1b22 SHA-1: e5f1df4cdaa422f38ad1df5f01f673980b225f6a SHA-256: e2d8180e05817f11d8bddebe6908dba56dfe20c815fc76c9dccea8bb910692a6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS upload storage or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is a common method for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073ecabb3658---rulaxekomefamepenonexari.pdf In PDF document text
    • http://tourbusan.net/FileData/ckfinder/files/20210607_77C6DE8715F48574.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/ca46f83e0bcf50a9d9dc86595a6f3385/mebadovilavesuleriral.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/5fscgn7re79n6f9mn3h8bugaa7/nawiteb.pdfIn PDF document text
    • http://sincaremedicaltour.com/js/upload/sisoje.pdfIn PDF document text
    • http://chanakyaaerospacedefence.com/userfiles/file/wazazugukotodaxilak.pdfIn PDF document text
    • http://orvosvalaszto.hu/uploads/files/doginifim.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210508125727_1353716936.pdfIn PDF document text
    • https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/160c555adeb34d---jizodezib.pdfIn PDF document text
    • http://mobilenmr.com/files/files/53149242475.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f041f6f5e9---vidanaboxomi.pdfIn PDF document text
    • https://chief-moving.com/editor_upload/file/17948816004.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/7bbd4bba39f97f26bca6fda36df17dd0/rikezazesodagat.pdfIn PDF document text
    • https://liniagdanskzydowo.pl/files/85924966200.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7fefec35f---64054576730.pdfIn PDF document text
    • http://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aae6f5b5272---17676783980.pdfIn PDF document text
    • http://parkhighclassof60.com/clients/871169/File/gotilibimigok.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/achk70j7aruv0ltddnkh9507pq/wekajususis.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609bc177e3d52---zedewipakudajifos.pdfIn PDF document text
    • http://citra.cl/userfiles/file/xazezikisefusinamunodan.pdfIn PDF document text
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16075d4b88c8cb---64764725777.pdfIn PDF document text
    • https://iguanapools.com.au/wp-content/plugins/super-forms/uploads/php/files/adqlpu1r5qaugb01k1fo19ne15/mebekuxezutunudulu.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/7o2bjp49eonm0adrp0spg07gp3/xanefeselurojujet.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/bpequv5j4j5rf9p0ioa3scsqoa/ralinedoke.pdfIn PDF document text
    • https://clubforeducation.com/FCKeditor/userfiles/file/59211515863.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=what+does+the+bible+say+about+pro+choicePDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ed2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2D 16848 bytes
SHA-256: 02a4c97b10446b967450b4485ad3916a9c6f792597f900dfed5dd6e4d12055ae
font_01_sfnt_off000118df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118DF 10856 bytes
SHA-256: b472cc45f9b142fd39df4eb209d5e0364f0b3714c83ff52b75cc2ccc23a94b96
font_02_sfnt_off000131e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1