Malicious PDF — malware analysis report

Static analysis result for SHA-256 490b5014d520d360…

MALICIOUS

PDF

88.1 KB Created: 2021-08-14 02:41:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1a80a55fb75ffddc5dba4d335c61839e SHA-1: a0963eea75784bdb178bfb848cd04a0040c6bb58 SHA-256: 490b5014d520d36042dc1e886391bb606d9447e52eb93af2fc8271c1234beeda
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The primary purpose appears to be directing users to potentially harmful sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://archism.ru/uplcv?utm_term=how+to+reset+sansui+smart+tv PDF link annotation
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/pvlqku4ltrqn59q2na25ecfcrr/pisena.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/xupupuvunilexuve.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4ff12e138dd5a278e78b04996bc467b6/60341950145.pdfIn PDF document text
    • http://hbleg.com/admin/userfiles/files/79714187641.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078bd6253831---70615344663.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098372167496---68109777732.pdfIn PDF document text
    • http://benrassam.com/uploads/files/zubepavopunabedakuz.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16080f51fee70e---xopukaxosepitizafanorig.pdfIn PDF document text
    • http://mfahk.com/upload/files/54265567792.pdfIn PDF document text
    • https://hyosungulf.com/uploads/file/bopabuzez.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/770ea004ea75f2153396efb9265e97b3/66025781780.pdfIn PDF document text
    • http://bestofbeer.ru/ckfinder/userfiles/files/puvorejigobimonaxozivamu.pdfIn PDF document text
    • http://xn--b1agjlwjc3g.xn--p1ai/ckfinder/userfiles/files/37583601247.pdfIn PDF document text
    • http://sport-way.ru/img/file/25111159847.pdfIn PDF document text
    • http://appletechsolutions.com/userfiles/file/nefiwilemolurubeve.pdfIn PDF document text
    • https://eventaipei.com/upload/files/dadat.pdfIn PDF document text
    • http://georgekoldun.com/var/upload/file/79423872039.pdfIn PDF document text
    • http://patrick-jardinage.fr/ckfinder/userfiles/files/jatalubeni.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086726c6509b---15945606108.pdfIn PDF document text
    • http://bigband-ulm.de/userfiles/files/16045039764.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/160991aa040984---57619589018.pdfIn PDF document text
    • http://yfatc.com/userfiles/file/85138165024.pdfIn PDF document text
    • http://itssilvertime.com/clients/2/24/24efe347a73a8ce028152bf895bc11a7/File/kinagikavisonejawuriruf.pdfIn PDF document text
    • https://zemiigori.com/uploads/file/ratikapafe.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_off0000f649.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF649 17136 bytes
SHA-256: 5aeeb279bef1973ea3203545994dc069a0daacb254ed745e651367a8318a8346
font_01_sfnt_off000122df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013af6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AF6 10464 bytes
SHA-256: 47226957725b2dda9306cb8f57bed72ec9fe2093f67901f43288737c8e9f5b3d

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