Malicious PDF — malware analysis report

Static analysis result for SHA-256 467979708d2886cb…

MALICIOUS

PDF

104.3 KB Created: 2021-08-01 05:07:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1d4f4007641d864f08f24e02c715c74f SHA-1: 6f24990f19f42436e9e756a338610c3e9c268a6b SHA-256: 467979708d2886cbae9807f4d143cc93fc477d925f8f0aa5745c8f40fc64d0e8
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier, indicating malicious intent. It contains numerous embedded URLs that point to various domains, many of which appear to be part of a link farm designed to redirect users. The presence of multiple compromised CMS upload links further suggests a pattern of hosting malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://philabc.ru/uplcv?utm_term=hp+envy+17t+touch+user+manual PDF link annotation
    • http://ratchadatitan.com/UserFiles/File/27150875936.pdfIn PDF document text
    • http://anhuicrew.com/upload_fck/file/2021-5-19/20210519125850742164.pdfIn PDF document text
    • http://biomisszio.hu/tmp/vebowigokafaxaz.pdfIn PDF document text
    • http://dkyangmei.com/uploadfile/file/2021072500114173499.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/pa8s0bbb53b29phi8vsjl9pod0/memurutiv.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608157d3dfb06---96302488743.pdfIn PDF document text
    • https://rm-parketi.si/uploads/xirutobewefojuve.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16079f313b8e30---lomogenubuxudiv.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/21380832457889cdd0f669f76467d649/jalopubigovaxoludapab.pdfIn PDF document text
    • http://travelspace.pl/userfiles/file/41949595920.pdfIn PDF document text
    • http://evpltravel.com/xv_image/file/98467830341.pdfIn PDF document text
    • http://henrysadiereunions.com/clients/876463/File/18127191420.pdfIn PDF document text
    • http://tipiland.net/upload/file/palorivofopiwivi.pdfIn PDF document text
    • https://rivnerun.club/images/files/28842535657.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b011451c92e---23478152318.pdfIn PDF document text
    • http://jongauger.com/ckfinder/userfiles/files/37735364222.pdfIn PDF document text
    • http://namuvaldymas.lt/userfiles/file/xorun.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bffce92339a---fekojofi.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/5fa4372b5b9e4f140dd2043380cb4e6f/47478048664.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160e1936157be9---2763351372.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/u62704p6233a0ctoqfnacgks75/makalapuwepi.pdfIn PDF document text
    • http://altelaw.com/uploads/image/file/kirujetosakobajif.pdfIn PDF document text
    • https://robotics-institute.com/wp-content/plugins/super-forms/uploads/php/files/t4gtlk7ntk5dhct9rdc1pqulvf/pusijizovigu.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_off00012fbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FBD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000147d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147D4 10920 bytes
SHA-256: 707bfa97ca46883c64b14e690f6bfc64264f288a20c8038121eef3ce103b619b
font_02_sfnt_off00016108.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16108 18900 bytes
SHA-256: 28c7f40d2e6bf539771fa3381d2742b7a5ff28be32117b0672b9d3dc5fb4abf3

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