Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ba49ec53c25c779…

MALICIOUS

PDF

80.4 KB Created: 2021-09-06 10:50:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d48de64fe34cedc0b372ddc9568df165 SHA-1: 27c32df2b7685215cccc98ba29242a4712441bf7 SHA-256: 1ba49ec53c25c7790a9554a005864c6e28ea9518418656725873ff6429cb1862
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised WordPress upload directories and disposable hosting, indicative of a link farm designed for phishing or malware distribution. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing campaigns that leverage these link farms to redirect users. No scripts were extracted, and the document body was unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/160bf9b5613601---21696198016.pdf In PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160918b4241bb8---69960693748.pdfIn PDF document text
    • http://safarang.com/basefile/files/42066789962.pdfIn PDF document text
    • https://ols.lighting/wp-content/plugins/super-forms/uploads/php/files/9e9b295ed3a30ce481377641b59f4b5f/10121123447.pdfIn PDF document text
    • http://lavalnerina.it/userfiles/file/wawuranapunigerox.pdfIn PDF document text
    • http://novussiteyonetimi.com/uploads/file/47746267601.pdfIn PDF document text
    • https://iqmuseum.mn/uploads/files/suwowamiweburezez.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/lapugawixepikibojisa.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/pg1iuoa5m8l7meura9nh25ucqj/26007044639.pdfIn PDF document text
    • http://stevis.cz/files/file/59116099370.pdfIn PDF document text
    • https://bliznacite.com/files/25795613319.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/ndph11j6n1uk5276g70o4437e6/bedogipepapotetapawuw.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/94b58cd87f11fc169a141e25bd2a52cd/milukujoz.pdfIn PDF document text
    • http://deeringbayrealestate.com/userfiles/files/70715364719.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/9cb3bebb3a7ebebaf86c0401b2af3a82/vipimeger.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160760f576e7b3---belevafakimubosakokogab.pdfIn PDF document text
    • http://halaljones.com/uploads/files/virabifegeda.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f04aee5fef---5291411892.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca13d65ffb---1755256348.pdfIn PDF document text
    • https://www.weboonline.com/ckfinder/userfiles/files/rafepofuwegatofo.pdfIn PDF document text
    • https://triangle-electronics.com/assets/userfiles/file/96512188608.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ad84f0df8df---wimefupodepotosurud.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/45704701248.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=tipos+de+graficos+estatisticos+pdfPDF 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_off0000d58f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD58F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eda6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA6 10608 bytes
SHA-256: 951689756551a064c578da3a3f6bae35fdd7080409daff34050e95562ff3ec4a
font_02_sfnt_off000105d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105D6 18492 bytes
SHA-256: 6795fc6813fd4544ada941be3093ca40efeea2cf2814273fcfa35cb32f82c394

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