Malicious PDF — malware analysis report

Static analysis result for SHA-256 32427077cfefac1c…

MALICIOUS

PDF

168.6 KB Created: 2021-06-26 10:28:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 05e88f05fd55cc68199433b4ba5f46b0 SHA-1: 322612f64009f9e004251cb415c7f6df796c884d SHA-256: 32427077cfefac1c89c77e3bb246be57b35ae403c68091324b080f214243350d
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites and are structured as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware through these links. The document body is heavily obfuscated and unreadable, providing no direct content-based clues.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9902

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://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/041f136cf50fb0d041b99651338fc316/35310334679.pdf
    • https://ecotranslation.ca/upload/editor/file/vogogejigedusipijubilis.pdf
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/oegen9800gjj1skj8pb9kitlln/73359266913.pdf
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078e6789d78d---7723294668.pdf
    • https://giolog.biz/images/bulk_images/files/83137219278.pdf
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/0ec8c8611c22cac3afd094bc67f125f5/bomixibopigox.pdf
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16090a21a822b1---12504697157.pdf
    • http://hollandunitedreunion.com/clients/5/52/52f3fdf721cdccceb566e47094f1d9de/File/witujuvosilomazurof.pdf
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608143227f079---kalilajorabeluwopik.pdf
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/160cf7a2d9571b---mozerazapejisotel.pdf
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607a0b70d7713---27094399165.pdf
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dee486b01f---xevevov.pdf
    • http://vietthanhstone.com/images/news/file/58938030884.pdf
    • http://ecohost.ru/pics/images/file/41338329329.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/79d629360b49cd1b137fb84fc396ed7b/vusidisalopedenip.pdf
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/6ba0cb9fea30ddf49f52d3af2904334d/soviguvusifumudupogen.pdf
    • http://hayatteknoloji.com/webimage/file/54015469793.pdf
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/81c1c5466c21a274d35061e614eb3ee7/vetuluse.pdf
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608395290fe5e---10943041134.pdf
    • https://unserbiokorb.ch/userfiles/file/jawagogodajubinobepipow.pdf
    • https://manualismedicina.hu/fileok/file/runodovobadanuruz.pdf
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b33fb2b3a2b---viroguxox.pdf
    • http://ahcxdq.com/uploads/file/050850053989.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=history+of+gibraltar
    • 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_off000233cf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x233CF 16792 bytes
font_01_sfnt_off00024be6.bin
b518b58843967e1af339818e5f3bf41e04d03bcf4ab7934eefc8af5795f2d7bb
pdf-font-stream PDF embedded font (sfnt) at offset 0x24BE6 10400 bytes
font_02_sfnt_off00026394.bin
b4118a33f76e472470ec7dfb5b84d9e2ab4d618b4d7501a920fc571d485210ed
pdf-font-stream PDF embedded font (sfnt) at offset 0x26394 19444 bytes