Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5097832fbbd3a3c…

MALICIOUS

PDF

72.0 KB Created: 2021-09-01 20:05:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8fcf2d6cd0cc9456e68769fd5bb1de37 SHA-1: c1b8ddce2a6015856ce5fc0316ca65ba62806c5b SHA-256: c5097832fbbd3a3c973739b20d4a188a5ea356d72d3aeb03d48ea2999b386a5b
156 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm or phishing lure. The presence of these links and the overall detection points to a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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=choreography+for+quinceaneras+near+me PDF link annotation
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/25d01f4d15304a923dfb84dd9f73ce8b/lumawabevi.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/4ac2b159c0b7a1f19d2855b4884e9885/wanika.pdfIn PDF document text
    • http://highlandcougars83.com/clients/2/26/268573c5102cd00412bac87cee9346ec/File/64311163572.pdfIn PDF document text
    • http://myshopgroup.com/userfiles/files/miwupebe.pdfIn PDF document text
    • http://www.onlinenieuwsbriefversturen.nl/gebruikers/afbeeldingen/12609580790.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c97f280c7f0---73791971474.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bba8489c4ed---3400009684.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/16076fdc9509b9---benerapup.pdfIn PDF document text
    • https://digireg.gr/upload/rideda.pdfIn PDF document text
    • http://madonnina.info/userfiles/files/kumeguresoxava.pdfIn PDF document text
    • http://i-daa-wl.de/userfiles/lewofupajozigoz.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160912d3091634---28056462374.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082eb54c8a24---wuwimokarofo.pdfIn PDF document text
    • http://sinhorelli.com/userfiles/file/waxilaworoguka.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7fab8d100---wafameritevomojuwama.pdfIn PDF document text
    • https://reparationmobile.net/userfiles/file/tamiwedizesiwobobusoxadi.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608959fed989b---69349522608.pdfIn PDF document text
    • http://mingmitrcoffee.com/user_img/files/66260891868.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/95765321451.pdfIn PDF document text
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/efd4daba9a3496a9be74ab60490b89e3/34949636647.pdfIn PDF document text
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/siseboje.pdfIn PDF document text
    • http://amandatravel.com/userfiles/file/tetesibevusavebowixeped.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_off0000b743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB743 16312 bytes
SHA-256: db9bfed2f1ad5025a9825507bc9511075532b6f52a19b951d5d6e8c0633c04a0
font_01_sfnt_off0000e089.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE089 11172 bytes
SHA-256: eca588289215bc38ef69df76d24b073693845cfb9cd8360afda2f72d27a742c9
font_02_sfnt_off0000fa40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA40 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.