Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd27a33bc8faaf67…

MALICIOUS

PDF

84.9 KB Created: 2021-09-04 02:09:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c40f3a2b609e4c6825abb10c246c8118 SHA-1: 906291d4d8ae2b3db1f8aa1d0f55c8539f2197df SHA-256: fd27a33bc8faaf67d49383b7c86264687bc2679508393e225e1b56648d91f1ac
156 Risk Score

Malware Insights

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

This PDF file was detected as a phishing trojan by ClamAV and a machine learning classifier. It contains a large number of embedded links, many pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content or phishing pages. The presence of numerous links on disposable hosting further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/cea75b46d2c6031ee9cc5376cb241c6d/napisozanorofupebo.pdf In PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813a08f03c8---galitet.pdfIn PDF document text
    • https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/18c68a0f608a2022cec8151f4601714d/49742190435.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076389aaa929---lunoxosumaluwimepobuvawid.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16099b81b1fb43---45703008285.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/6007e30358bfd3de3d2a185c2d131126/xetapeso.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/dbaba221e0dd721b6125adcfa959bba9/kirotadejukikofudebuvibu.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b299d427f38---46023997925.pdfIn PDF document text
    • http://asavn.vn/uploads/userfiles/files/6318638428.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a336901dda5---zomojuzemomebusebakipo.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0411941bdb---tuvuzinikuwavelake.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/161207d80db795---rekog.pdfIn PDF document text
    • http://www.extramas.com/userfiles/files/33998669412.pdfIn PDF document text
    • http://huucodatlanh.com/userfiles/file/37532812348.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca4f707bb4---tamabopulif.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/b3b17f66398552718501690352b6999a/xowapezebivuvufawowuje.pdfIn PDF document text
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/7fmahm3o6k7knoij9ugslsk1r2/16578181521.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/musagomakemog.pdfIn PDF document text
    • http://creativetechno.in/userfiles/file/85781317708.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/161125e004b365---22705586915.pdfIn PDF document text
    • https://szekszardportal.hu/userfiles/file/31244419892.pdfIn PDF document text
    • http://tablica-nieruchomosci.pl/uploades/fckeditorfile/44409375167.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/rupudosonogeko.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=environment+and+sustainable+development+pdf+class+11PDF link annotation
    • 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_off0000e495.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE495 11120 bytes
SHA-256: 0576a909b2f33954cd8ae7a560142208a21275bfb0233f9557859b56e1fdfd22
font_01_sfnt_off0000fe5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE5D 18152 bytes
SHA-256: 24bd1fe687ee9d716cc335d835fc4581e616c4aac35832aa9c0ee2ed5302ec3d
font_02_sfnt_off00012d0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D0B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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