Malicious PDF — malware analysis report

Static analysis result for SHA-256 05a06fc65c877bc6…

MALICIOUS

PDF

83.9 KB Created: 2021-06-25 19:41:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 880203c5499a899e7116afc1cec1588b SHA-1: dd8dd7df2caad4f5b86aa87fb2ec0944ec3dd156 SHA-256: 05a06fc65c877bc6f5f0b2c725cc0d0fd74e21be03cdd6a9db8d4d145c600772
96 Risk Score

Malware Insights

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

The ML classifier strongly indicated maliciousness, and the PDF contains numerous external links, many pointing to compromised WordPress sites. This suggests the PDF is designed to lure users to malicious or compromised content, likely as part of a phishing or redirection scheme. No scripts were extracted, but the link farm nature is a clear indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 5

  • 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://hostingalani.com/calisma2/files/uploads/dajagatotavepowegoketad.pdf In PDF document text
    • https://hyundaia.ru/userfiles/file/11110895999.pdfIn PDF document text
    • https://leesman.com/wp-content/plugins/super-forms/uploads/php/files/353458c737adbf53b8a1759616564c58/zakuturezimokiboxipaf.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd20ce8f61---62816816952.pdfIn PDF document text
    • https://asaptransfers.co.uk/wp-content/plugins/super-forms/uploads/php/files/r4hgt25ce73kika6oimgm61l73/ladifitobibudomowelilaz.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca6091069d---juledorade.pdfIn PDF document text
    • http://txextremecarts.com/userfiles/file/53347000777.pdfIn PDF document text
    • http://hongshengfish.com/uploadfiles/2021052301520483856.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bb4c3f02013---nujopuwide.pdfIn PDF document text
    • http://topas.lt/userfiles/file/godorikimubadi.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6cebba907a---dunepoko.pdfIn PDF document text
    • https://whitesal.com/data/images/file/3339_20210522121711.pdfIn PDF document text
    • https://local-atlas.ru/userfiles/files/vipek.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8fd598f501---xebetolasivos.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160a41ba87e609---kewiwudevox.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f0d77f567---89514679346.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f428028674---77159070929.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/khquh0cn5pc1l2hnsbnm1l7ec7/nenuxutitoxizevom.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f102697f86---zawutifowazejibidazusit.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bbad50e85f4---70188012199.pdfIn PDF document text
    • http://eventologia.com/userfiles/files/83609519646.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080990d70aad---xusibexipodugoxekom.pdfIn PDF document text
    • http://yngc.ru/admin/ckfinder/userfiles/files/59852844725.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/jesolotesadilavuwiram.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=dirty+dancing+slow+songPDF 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_off0000e741.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE741 16544 bytes
SHA-256: fc2d4755e16a612a2e626bd7b364c3963738b71fe8e3340e185696362ec15293
font_01_sfnt_off0001123b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1123B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A52 10616 bytes
SHA-256: 5eec12a9d7016e903de3967f705078b8e48532d4a843062080a7f2fe6fdb96b9