Malicious PDF — malware analysis report

Static analysis result for SHA-256 20b14fb9224ad08f…

MALICIOUS

PDF

101.9 KB Created: 2021-07-05 23:11:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f7a3f8b1aa0603778261a208abc2c463 SHA-1: 9f7e198a7ad162fdafae225ca868c8b6502282ec SHA-256: 20b14fb9224ad08fc14902ac9b959cb34a164e259e77d9337c187ed516104783
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous external links, many hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure points to a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9803

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nomylo.ru/uplcv?utm_term=how+to+get+undertale+true+pacifist+ending PDF link annotation
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609920afee454---mepotibajavakalitefuvetid.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/ef58f92ffdf89a16f6627ebb34cc3f99/72175610969.pdfIn PDF document text
    • http://olympicburger1988.com/uploads/files/kizadodotolunuk.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160bc9da131778---wedepasiva.pdfIn PDF document text
    • http://hakkabrothers.com/userfiles/file///97917265471.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/16094cb674168a---zejoluvowalomevawiveso.pdfIn PDF document text
    • http://szzxwx.com/Upload/Upload/file/2021531152327713.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160d03b9a6394f---56876310093.pdfIn PDF document text
    • http://taikenplan.jp/ckfinder/userfiles/files/bisuzivatubidi.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/a438e0716c7729110d19bd7f9b789f11/33669512014.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081cb496e3e9---69339945860.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/68c731e076a07a0a37de6dddbc29ed5a/20650175733.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/089dcf638bc58f73287754a4c288ae8b/68410993618.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609c79321f375---kefotakejuzimamuzuxen.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608573cb4368e---poxagag.pdfIn PDF document text
    • http://teplospectr.ru/images/files/8734514839.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c030c89871---72363770937.pdfIn PDF document text
    • https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/7g9dpedficvk9v6sgirgihki8p/pitutowaxesamal.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607215de3ba61---3427634371.pdfIn PDF document text
    • https://www.stjohnhomelessshelter.org/wp-content/plugins/super-forms/uploads/php/files/312c49b1132490ec9d40d82794f6b35c/34029959344.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/202c33b5081aeff519304bf9ebf52200/lunezu.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b09356f41---vunukesavu.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/08303a974de88eea9fc1d3de769f8c28/falefezuputipawiboderasu.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086c41cbcd1b---35224949026.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/xuponewabafidava.pdfIn PDF document text
    • http://jnnycc.org/userfiles/file/98215626843.pdfIn PDF document text
    • 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_off00012b90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B90 16588 bytes
SHA-256: 780e79ad5ca232c7f388fdf172571933ff81ec0b8364fcee8cca57cec3f8e1e1
font_01_sfnt_off000156c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016edb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16EDB 10972 bytes
SHA-256: 161e2295e556f9fe73323382aa6240818edebc3d9122fb71d161ea1e11742581

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