Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0277b9119764dca…

MALICIOUS

PDF

93.1 KB Created: 2021-06-26 09:18:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 26a437edd498d7aaa723aed1b980dad6 SHA-1: 3a5c39032208c36231e40b8339a7e4ef6f557d29 SHA-256: c0277b9119764dcab4ff82e8adf91d1fdc2f14635c7cadaa84e71e08faaebf98
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing campaigns. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://irlanc.ru/uplcv?utm_term=tenelle+my+heart+beats+for+you
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/71183adff991c558c7e338794735ca24/95272020528.pdf
    • http://fittbike.hu/files/file/22745070769.pdf
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160896d21bd553---13797262167.pdf
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/e7a177a7892a80ee78dc0d0b028a99c0/vuvoxesira.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607bde1e2f372---54461825613.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607673ae0f53b---4415217358.pdf
    • http://daycamhoa.net/upload/UploadFiles/files/kiregumuvozevirukufamar.pdf
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/m67estcu3h6gf5gshqr1tvclog/29137099221.pdf
    • https://napraforgohotel.hu/upload/file/norajuzofowegixi.pdf
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b6bc5d12853---dugumeliler.pdf
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/ae779c421b902f75570db124e375253b/41060818677.pdf
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/54jnpkrj5k4cp5akbo6756bqm0/fimafexajolaxomiwiwozob.pdf
    • https://scriptdd.com/_file/file/soxemavutuxatakuf.pdf
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dd22099367---30827623721.pdf
    • http://allprintusa.com/admin/images/file/54806944408.pdf
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/60480f3bb2d85c0be295fb7d996e15c0/fevaweju.pdf
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/0a254a59504c2077f2b03bed966bb12a/wiruzidizif.pdf
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/a9ecc0ad60ad1347719a2119bdbd0499/mokexibufuxuzozowezubo.pdf
    • https://fotoprint.lv/downloads/file/63443623420.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/f5nkgb284nobier3giscboblji/pubapilazixifebutit.pdf
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/68877798111.pdf
    • https://alshuka.ps/ckfinder/userfiles/files/5407009026.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160ceb6a43dd09---60430485377.pdf
    • https://glaze-metalart.com/upload/files/mibomizuponewumulup.pdf
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/0metn0v5so8s053tb13u4li2o3/61752100576.pdf
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5fb74fe06---9551690581.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_off000107cb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x107CB 16792 bytes
font_01_sfnt_off00011fe2.bin
a570cf973a5eb9ba94da42990da77763e96e8dfd007a350764e67e11e885f457
pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE2 10704 bytes
font_02_sfnt_off00013848.bin
c7415a2b1dcc34e4f5d3e6969c864516b971e2f5620b0c137efba431929cd087
pdf-font-stream PDF embedded font (sfnt) at offset 0x13848 17356 bytes