Malicious PDF — malware analysis report

Static analysis result for SHA-256 14c1f5167bee3c40…

MALICIOUS

PDF

84.3 KB Created: 2021-08-12 03:06:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 58a2c5fa918c7b8cf506e2edf824ebee SHA-1: ab8db8bf2a4115a653782292e01bfce1bd9cbdca SHA-256: 14c1f5167bee3c40648ee86008d66315117bd5e79a68b2ad82548f0d6d626878
164 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery. The presence of urgency lures further supports a phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://crewmak.ru/uplcv?utm_term=toenail+removal+care PDF link annotation
    • http://nuestratierrapremios.com/campannas/file/nakezipajak.pdfIn PDF document text
    • http://homeshopeez.com/uploaded_files/userfiles/files/retuvexudoratabowim.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608904c78a0e7---dozemum.pdfIn PDF document text
    • http://greenbrier101.com/userimages/56003154561.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/16476643442.pdfIn PDF document text
    • https://malashealthcare.com/userfiles/files/77596117238.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e1c62cf0f---joperuvenefepudibetin.pdfIn PDF document text
    • http://oaklandscreche.ie/userfiles/files/98411666022.pdfIn PDF document text
    • https://justforjetscatering.com/userfiles/image/files/5916380849.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4587a777dc---dojaxesexekaxujijazisev.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/1373617d85eb82a288c0cdd909016313/32869621799.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/mcuu8ue4hdrpb2pfsvedqmmc2u/21703130641.pdfIn PDF document text
    • http://gsmontaggi.it/userfiles/files/mumoxugowopibava.pdfIn PDF document text
    • http://drthchowdary.net/userfiles/file/99236333262.pdfIn PDF document text
    • http://rayzerfamilyreunion.com/clients/0/08/08e2d5bcffca37c2e1a82d364f4296c6/File/47320547450.pdfIn PDF document text
    • https://ginniglobal.com/uploads/file/duwedafabegasig.pdfIn PDF document text
    • http://aitrans.cn/UploadFile/file/F1202106281050466349.pdfIn PDF document text
    • http://dancephoto.ru/userfiles/files/70953317899.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e232644c0e---vasonazefodobusanudip.pdfIn PDF document text
    • http://primavera-bio.cz/userfiles/file/58224244322.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/a1ef46a1cb02b0fe88da81ce9b16687e/vigelamupa.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160be83135ced8---16879170864.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16090957556ebf---52003524429.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_off0000eaaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAF 10152 bytes
SHA-256: f04d1db57644e78110578249e6533612c5f4f47cf9b3ca837f6ba22d9b4a7734
font_01_sfnt_off0001015b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1015B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001196d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1196D 16156 bytes
SHA-256: a966fe23aaf8125aaad8b5e413f50f6dce1cb81fe8242db57998d28a1c38ac5a

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