Malicious PDF — malware analysis report

Static analysis result for SHA-256 160dc57c469e9624…

MALICIOUS

PDF

79.8 KB Created: 2021-08-27 22:28:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: c83d69ba044362dd9a618006ced6fd08 SHA-1: 941d6ab75a5b843ad75a9527acc566f5a2ccf19e SHA-256: 160dc57c469e962449f4a11bade1bbf7631ac7d142032f74ba76a0d220beb174
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to numerous PDF files hosted on compromised websites, suggesting a phishing or malware distribution campaign. The presence of these links indicates an attempt to direct users to malicious content, likely as part of a broader phishing or malware delivery scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://akpanlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/xesebekesatasil.pdf In PDF document text
    • http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f57589a78---27193872970.pdfIn PDF document text
    • http://stensoproject.com/userfiles/files/banibonobeg.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/xidosadikidipew.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c378d82f36e---54540370572.pdfIn PDF document text
    • http://chornakorn-packing.com/ckfinder/userfiles/files/82530128885.pdfIn PDF document text
    • https://angkalaris.com/contents//files/wozukoli.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16107d405ed203---tivonovidaw.pdfIn PDF document text
    • http://debseven.net/UserFiles/File/40987370125.pdfIn PDF document text
    • http://ridendo.cz/files/file/lexupiwupokotedivemez.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/ffbdaf7c3dbd27026772fb43be4c08b3/55979955420.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/985416099609ce2cbceda0.pdfIn PDF document text
    • https://creteotels.gr/FCKeditor/userimages/file/69398493752.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/oatk0j997qkr02q4n2nhn585b5/lezuzuxudikaleroruri.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f873e5833b---17352982209.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1611badb07614c---naxusekidez.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/50533908613.pdfIn PDF document text
    • http://meandnetworking.com/ckfinder/userfiles/files/kawitupa.pdfIn PDF document text
    • http://suapaiatuipelehakefamily.com/clients/80707/File/mijadutujuwiwad.pdfIn PDF document text
    • https://www.osteopathe-montpellier-sud.fr/ckfinder/userfiles/files/34967568582.pdfIn PDF document text
    • http://droprint.my/home/ququ4923/public_html/userfiles/file/8694999140.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a00ab6a2ea---baretuko.pdfIn PDF document text
    • http://ke-sen.com/userfiles/file/1628639130.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=fructose+is+an+example+of+aPDF 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_off0000d3b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3B4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ebc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC6 17280 bytes
SHA-256: 5b5d638a8e92173d70d1db8ceb4e788b134f4c47cf1529be143103f01d3dfea8
font_02_sfnt_off000118aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118AA 10820 bytes
SHA-256: 014bac62450d8309daac504a870768a02294b04d7c0642061d6a327a380402a9

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