Malicious PDF — malware analysis report

Static analysis result for SHA-256 e42c8bc4488fada0…

MALICIOUS

PDF

88.4 KB Created: 2021-07-09 12:29:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5724cd7150c8be1cf127b497e37da72b SHA-1: c8b831f24a50dd18c758d69b4b4a6cdfc8cd89c4 SHA-256: e42c8bc4488fada0e9f02cf3bce45b5df50378491d8b42569a244fe4fbf24ffe
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The structure suggests a link farm designed to obscure the ultimate destination or to leverage SEO tactics for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://pindimana.in/uploads/file/62409784803.pdf
    • http://fultonhighschoolclassof1977.com/clients/a/ad/adf64365ba34d951c098eb677b062caf/File/64375852510.pdf
    • https://rosycaffe.com/file/jakeneguviwu.pdf
    • https://xn--nmqu14inmf.com/upload/files/nizufakuvedojipopejidoz.pdf
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0a3f362e8---xafigijedujemo.pdf
    • https://bnbtravels.com/ckfinder/userfiles/files/31674291864.pdf
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a20d9937d22---19102353894.pdf
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/f21a49dc4ece288511aea20c0984ad68/27804595190.pdf
    • http://oicenglish.com/imagexx/files/28795457181.pdf
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab72c6dec01---34002002878.pdf
    • http://norilskgu.ru/userfiles/file/57968600096.pdf
    • http://karinameal.com/imgdish/files/tatijiwajurizapusako.pdf
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9bf550c82---10639470229.pdf
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16079a45737638---padowosevalizaxo.pdf
    • https://www.emma-solutions.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608770aa44dbb---sebexovivutorogixafegor.pdf
    • https://cmsschoolkg.org/userfiles/file/metovosidafamolikogixem.pdf
    • https://tahubunting1.com/contents//files/36527798734.pdf
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/qi02ojmrnfj23dl8vgr9lr3ha0/fazisavatetal.pdf
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160754cfc51e6c---dudenowinilerenotonima.pdf
    • https://healthmatters.me/userfiles/file/32367271917.pdf
    • https://clarkfamilybuilders.com/home/clark/public_html/ckfinder/userfiles/files/47979355007.pdf
    • https://mollis.rs//files/xotosofogab.pdf
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/3q1a4mun42jnaea1b3quid5nk1/wefer.pdf
    • http://tatugigo.com/ckfinder/userfiles/files/xologeniwinakozamisa.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=example+of+peel+paragraph
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6f1.bin
eff95f8608e998698b2f2b3fe56ac865c71807411e4e6250ef2ad62c0b2f59ce
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F1 17680 bytes
font_01_sfnt_off000124d7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x124D7 16792 bytes
font_02_sfnt_off00013cee.bin
3be3054712e398df8541f46c725756efb8fe04e15f29eb15615de00253da043f
pdf-font-stream PDF embedded font (sfnt) at offset 0x13CEE 10428 bytes