Malicious PDF — malware analysis report

Static analysis result for SHA-256 abc68870feaf1576…

MALICIOUS

PDF

75.1 KB Created: 2021-09-02 00:05:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 84d460063f02ece7e3b9e352e5a72f54 SHA-1: a09a37afc7989b6a160b5d7dd4bc46221f7f14f9 SHA-256: abc68870feaf15766cd1ede882ac4ceb847ba17771057859ff6e3016b7bfebfb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious. It contains a link farm that directs users to multiple domains, some of which are hosted on compromised CMS uploads or disposable hosting. The embedded URLs suggest an attempt to lure users to external sites, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure and URL patterns are indicative of a phishing or redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://innospectrum.eu/hirlevel/file/30946394604.pdf In PDF document text
    • http://buyo-g.net/userfiles/file/sokotaxunarevumuguwasixut.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/aotkto73vvk6m9kv5es6ig9088/sovofetejim.pdfIn PDF document text
    • http://inoxbienhoa.com/upload/files/54321811854.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160df8bde0387a---barob.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ee14d51ecc---82938734111.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/a502293ec7dc64232447c431113af878/deteriratuv.pdfIn PDF document text
    • http://zabbeleecooking.com/ckfinder/userfiles/files/69309038524.pdfIn PDF document text
    • http://premiumresourcing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609744cdf2710---20444062118.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/16090a76b797ce---naredopasakugimewujum.pdfIn PDF document text
    • http://tipsclubcr.com/campannas/file/juwosuxif.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/file/55395555722.pdfIn PDF document text
    • http://kingswaytyres.com/project/kingsway/uploads/file/82255769437.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/68nmupfmscdamoq9dajjf0alcn/nebamujobumizimivaseletex.pdfIn PDF document text
    • http://harringtonandlombardi.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/raxetetagelowalatej.pdfIn PDF document text
    • http://pdww.ru/ckfinder/userfiles/files/zobawejopuma.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/e415a7e52fb12145361cfd6deeedfa59/43562182188.pdfIn PDF document text
    • http://geteffective.biz/uploadfiles/file/bodisawawiparekuma.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/1fee3385b3aca64cc203aa0c28d71364/jaripu.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/wolusavutepewigon.pdfIn PDF document text
    • https://rosycaffe.com/file/32555662742.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/8he4ta49jvvd5aj1ih153demif/8224234051.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b311ce665---63694187923.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=westward+expansion+study+guidePDF 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_off0000c161.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC161 10916 bytes
SHA-256: 616c040b06ca124cb77bef1f0137c2e6655b096ab49491c6d3f620f8928acbe3
font_01_sfnt_off0000dab1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f2c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2C3 17084 bytes
SHA-256: d62cdd58bbdb84b7126cea350945b6c2915f7f9a6c9cf99ef3abad694762edc1

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