Malicious PDF — malware analysis report

Static analysis result for SHA-256 f58048696b9fe432…

MALICIOUS

PDF

75.1 KB Created: 2021-06-26 21:10:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 14e743821bca405b534c74ba0bedaa93 SHA-1: a45af8de78e3866739d0bf4ab98f976a9d42bfa0 SHA-256: f58048696b9fe432f77ab68f6b81f475af91aebba3735046d35c107c65d921b2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external URIs, many of which point to compromised WordPress sites acting as link farms. The primary attack pattern appears to be directing users to potentially malicious or phishing websites through these links, disguised within the document's structure. No scripts were extracted, but the PDF's nature as a link farm suggests it's intended to redirect users to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://laborke.ru/uplcv?utm_term=the+hobbit+an+unexpected+journey+free+streaming
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/892894d21d489f8a4b9eea0db6f8fbb8/94659946923.pdf
    • https://sportli.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160abf1b17f2b7---32574914199.pdf
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/980da7aa2afe0a3861345e5c0ee7e1f6/17752704856.pdf
    • https://meesens.be/KrMee/Tekstverwerker/pixuxaperax.pdf
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ab8ed96e809---2351401186.pdf
    • http://bakoca.hu/files/file/41591999175.pdf
    • https://ekransamara.ru/files/pezinozilemokurepanis.pdf
    • https://arendic.cl/files/85543801856.pdf
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/630pp46cnsb7f2b9l554lhhdq7/98687595071.pdf
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b456657c47a---79840780322.pdf
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1607a195d32382---duwuporenetidalim.pdf
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/7f11c1f1d7c92e0d90f3f68c82ae1b00/6516592235.pdf
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/2pblmd4sb2vej8kirkb7amjhh1/2689164665.pdf
    • http://asfalon.com/__files/file/doxavugifagabugore.pdf
    • http://www.jindatunnel.com/up_files/file/74779538166.pdf
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b8551b875b4---nuvafakugizozur.pdf
    • https://www.apollopowersystems.com/wp-content/plugins/super-forms/uploads/php/files/10e5a1bed5ecc40e371f689011315112/wozixadale.pdf
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/25786406404.pdf
    • http://ecohost.ru/pics/images/file/29846359255.pdf
    • http://aep-tc.com/cache/fck_files/file/kubadapimunexadeja.pdf
    • http://natproperty.com/userfiles/files/zurawozono.pdf
    • https://al-farh-iq.com/upload/userfiles/file/54149695815.pdf
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/d37baea54799afa384ddecc7ec9507aa/buxotinizowijutonetogab.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_off0000c052.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC052 16792 bytes
font_01_sfnt_off0000d869.bin
8afe79041c6183b80308baa67292b48db6a8e3929301236348e6caaa4b1285d7
pdf-font-stream PDF embedded font (sfnt) at offset 0xD869 11568 bytes
font_02_sfnt_off0000f348.bin
ec9b27f1458799a3074ad16939c0f3469b03f0c516c446912422df97b2884f7c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF348 16648 bytes