Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1ce7185f353acfa…

MALICIOUS

PDF

86.3 KB Created: 2021-07-02 12:09:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: de7aea9a53e9d04710d5cb088699a91b SHA-1: fb4d80cc548da3c5a8c6d6d0eaf1b247c39ac2dc SHA-256: c1ce7185f353acfac64bf0807acde5dfec2f9161c7f24a41bfcde2abe33f4d17
156 Risk Score

Malware Insights

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

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links to potentially compromised WordPress sites, suggesting it functions as a link farm to distribute malicious content or phish users. The PDF structure itself does not contain executable scripts, but the embedded links are the primary attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/e64e0589324f715aaf42511b5fb3d51b/67886585969.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609680c310f7d---95596641517.pdf
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/3684b9a60268d868fd1ea161fb0e34ff/40425088887.pdf
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cdf110c8062---dizikanasexokakenijetofob.pdf
    • http://ketnoikienthuc.com/upload/files/xabewawabefugazedujof.pdf
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/psa0upnatnp1brs0sss1lpc7f1/fokoweligumekoxuzes.pdf
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afcdc5ef185---sesiwakuxugaxidamivexitex.pdf
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1609b3fb19017b---zokadun.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c0611336e0b---gikotewujuxiwogumadew.pdf
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/umdh7dmmajfjcahr7erjfmnb76/95736032688.pdf
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160989c04dc08b---zoduwenagedakuler.pdf
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8b63c8a6f---xugotes.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/po4nd7giqddj6u25bcj1mjnoqc/62030002397.pdf
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/d1i1nanqn58ibts36v7sqng38t/79935205306.pdf
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/769k9lj0723h2v73pn4s0jgsq2/bifebuxuluxigadoravad.pdf
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/6dea645aed469e8befac958db29e1a5b/90206753689.pdf
    • http://www.gesas.it/media/mailinglist/file/87034884252.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/nk8c3g886tif8dj6c0v37udabk/jaxemuterunisu.pdf
    • https://numberonerevolution.it/file/rigavurogiwereranuri.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/20fc748af75da1ac0bec3cac9abe22bc/74347918911.pdf
    • http://minhphucvietnam.com/uploads/userfiles/file/58758175727.pdf
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16090968d982f1---48697566067.pdf
    • http://15fratrowreunion.com/clients/2/2b/2b18ccadde375fd95e9ac2d5db5aaa67/File/zolumus.pdf
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc2da04a14---duzagaradiverag.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=insomnia+and+grief
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/fedd5578b672dda7daa57eba4fe0820f/648604888.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_off0000f07d.bin
e10cb73c7f9502ef1ea3ab5f320853febf559a86cd75fea64befd898cd22550c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF07D 16444 bytes
font_01_sfnt_off00011af8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11AF8 16792 bytes
font_02_sfnt_off0001330f.bin
62ed33e1deaadc2b29d762ce74ea9b4525a30b64a3c38653ec9245a682980e11
pdf-font-stream PDF embedded font (sfnt) at offset 0x1330F 10504 bytes