Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c08b501bb7b8883…

MALICIOUS

PDF

85.1 KB Created: 2021-06-27 10:13:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 9fb83eb81813ce51dfdb0a7a7c620c4b SHA-1: 8e8902b248e35427e8df56c498c24a083c74a09d SHA-256: 0c08b501bb7b8883b8a3baaafbfe03a0d52fd18516913e2058e2da61d2ebd7b9
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF document exhibits characteristics of an advance-fee scam, luring the user with promises of a prize or parcel delivery. It contains numerous external links, many hosted on compromised WordPress sites, suggesting an attempt to redirect users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://synerhu.ru/uplcv?utm_term=comma+before+as+because PDF link annotation
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/48e0ceca364f175052258dfbbf6e7a38/pamakiwotutojoz.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/16098339c17917---tixoxitag.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6e1ea8d62---pitesasaxod.pdfIn PDF document text
    • http://gopherandsquirrelcontrol.com/admin/images/file/59692652863.pdfIn PDF document text
    • http://sztarmedia.hu/_user/file/96183385061.pdfIn PDF document text
    • http://eltonltd.ru/sites/default/files/uploads/56448443539.pdfIn PDF document text
    • http://bisenzia.it/userfiles/files/88964894025.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/soloxa.pdfIn PDF document text
    • https://edbcagliari.it/file/33365482298.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160bbee69187ef---wefuvumuno.pdfIn PDF document text
    • http://ipceurope.eu/assets/file/kavipivumirumobarixeme.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/c05e4cf3b3669eeff84ad7eb5f12b132/dolojegetajopudo.pdfIn PDF document text
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/4d7333a805a98b99d3d72adb40803654/18167009939.pdfIn PDF document text
    • http://xn--80aamdqpfpr.xn--p1ai/upload_picture/75564320898.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9de120d4f4---29778595211.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608db9f96e791---vaverejebitebiganunaxidos.pdfIn PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079b284b4452---dowasakuvitom.pdfIn PDF document text
    • https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6ebe7a386---13410504465.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/de359d0e650a2dbbfc00d1d5eaebdeec/kanekijeniwozamuvuvexuje.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/b25bc2f3d4ecf3bbfe881e7b829772ea/rabixabevokamuxetaparu.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/0b8d9eddc83ff7235f3225b663fb742f/bavarefuwubilaved.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/frlqqifilsosolspaq54kfnfh4/22006053511.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607489aa94e6d---xutavawuxisesi.pdfIn PDF document text
    • http://szentistvanpatika.hu/upload/file/pomiriz.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/85971319798.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_off0000eb88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB88 17204 bytes
SHA-256: c239989d922e76f673fbfdda210519f017478c3b0a48c3c47b3cbff37394560a
font_01_sfnt_off00011813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11813 10428 bytes
SHA-256: 9dc1a53c10dfc351ab49823b239e8f3261517de357696dc7066009c4bab7935a
font_02_sfnt_off00012fcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FCB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1