Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcc5010163147051…

MALICIOUS

PDF

78.7 KB Created: 2021-09-20 08:02:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 5ba96481fe2801e9f77767c2303e2371 SHA-1: 62e7d61678a515ba27562a9642448d3f05ba6887 SHA-256: bcc5010163147051eeea8a147309df2856a942c3fd9d51c6e46f1811082fc3cb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains numerous external links, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://drafthe.ru/uplcv?utm_term=gamegem+apk+download PDF link annotation
    • http://funkyspa.net/ckfinder/userfiles/files/65688083443.pdfIn PDF document text
    • https://tezerwatch.com/file/upload/files/09-07-00-56-09-66.pdfIn PDF document text
    • https://quizai.com/uploads/files/latupafirakiwulaj.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/0730bd08f9f2aeacd6d4179da37ffce2/97594566319.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/u2fu99fq3e0i27uoatgpmqtsqb/2571237868.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/uu0cpcg1u9incl2k992cme1im0/62331113752.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613b3bab76ec7---13947899388.pdfIn PDF document text
    • http://osteriailgalloelinnamorata.com/userfiles/files/pitapegofabafazaxabudiwuw.pdfIn PDF document text
    • http://sanzmendia.com/userfiles/files/29297054958.pdfIn PDF document text
    • http://nextlab-semi.com/files/fckeditor/file/39632084148.pdfIn PDF document text
    • https://houstoncoinshow.org/FCKeditor/file/65492854445.pdfIn PDF document text
    • https://bharatiyabhashaparishad.org/ckfinder/userfiles/files/toxoxevakad.pdfIn PDF document text
    • http://beautifulmoda.com/userfiles/files/24565851337.pdfIn PDF document text
    • https://premium-house.uz/images/file/53137680114.pdfIn PDF document text
    • http://fishngrill.iorderfoods.com/uploads/files/97871766258.pdfIn PDF document text
    • http://asu78.ru/userfiles/file/54050810642.pdfIn PDF document text
    • https://conrays.ru/f/data/1141513428.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/wugapugisupogupefonilokel.pdfIn PDF document text
    • http://www.radanhorse.com/resource/files/zetupunisojedegufaxidujo.pdfIn PDF document text
    • http://marthomaiticherukole.com/userfiles/file/vexuvenirawebe.pdfIn PDF document text
    • http://bowie.abwingsmd.com/uploads/files/41677959686.pdfIn PDF document text
    • http://xn----7sbezcba9a5aggb3j.xn--p1ai/ckfinder/userfiles/files/goluwoxurufederal.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_off0000d039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD039 17868 bytes
SHA-256: fbcadd487394b913ac9f43c23125cad9d18d5fcc13b31e7e764298ebfee6849c
font_01_sfnt_off0000fe35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001164c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1164C 10496 bytes
SHA-256: 200c137ab480b5e98caea5066e966cc5ba4190e08fa5ee85ea89a22de8607213