Malicious PDF — malware analysis report

Static analysis result for SHA-256 240a2332ba6cb107…

MALICIOUS

PDF

99.5 KB Created: 2021-08-18 00:02:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2beff96871920c1a67afa89af48454d1 SHA-1: 14e483f2baa58671205807e9cca96baac1534b87 SHA-256: 240a2332ba6cb107691e516b432eec34051e6279670cb551741f9cd705f96787
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or malware distribution lure. The document contains a link farm pointing to numerous compromised websites and disposable hosting, designed to redirect users to malicious content. The primary attack pattern involves exploiting user trust through a seemingly legitimate document to facilitate further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9880

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://penzionradvanice.cz/res/file/tafixosoligetigosej.pdf
    • http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16103beb8e6a3b---79738395371.pdf
    • http://zekidilektekstil.com/images_upload/files/desasebesojojefoxoz.pdf
    • http://imhkayseri.com/resimler/files/76793271600.pdf
    • https://cambodiadriverservice.com/userfiles/file/gubarazibaziz.pdf
    • http://amuseonline.com/absite/userfiles/file/fowilar.pdf
    • http://vnos.vn/app/webroot/uploads/files/sedobukexolizim.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/161095e9dd1aee---duxejonuwedutikus.pdf
    • http://stepsforstarlight.com/clients/c/c6/c668404594a1c08d975ab50c7bec58f6/File/kedavunuferavowotiboja.pdf
    • https://hojoairport.com/images/file/divuvade.pdf
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c31bf14daa7---netoxuparuwi.pdf
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160ab0d8031c89---xovorev.pdf
    • http://robalton.es/Albums/images/file///vetezixatuze.pdf
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdcddc69bae---gaxutoraloborusid.pdf
    • https://arerp.kr/data/file///45871329923.pdf
    • https://grancom.by/upload/docs/madewimadorovokupoz.pdf
    • http://kpghomerepairs.com/uploads/image/files/10248577203.pdf
    • http://sculecuacumulator.ro/app/webroot/files/userfiles/files/28493605177.pdf
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610fc5c3acc5d---lafujajimorijegipazovuj.pdf
    • https://hotelmitrutarija.com/uploaded/files/72194663183.pdf
    • http://bundoreh.com/fckeditor/files/file/69634749656.pdf
    • https://haisanquangninh.org/data/dulieu/files/tapaxelonekowulamasotulig.pdf
    • https://iwnta.com/userfiles/file/nomefuletegedavozi.pdf
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/b0e592655b3f6553b0c8b9043aa2c604/77510137040.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/v1om5q8hsdr7icigs0i5nds155/26458742167.pdf
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/jshmniec8cht1qn0uo1f8rv0u7/44644207316.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb0deabc9e4---dibelar.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=the+everything+spanish+grammar+book+pdf+free+download
    • 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_off00011a85.bin
80d09a76a1453e5ca047e0e3a96a691b172a648d49d79bd37ad408a871f75c97
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A85 11404 bytes
font_01_sfnt_off000134e4.bin
b329493ec4b34d0cbd7c9fbf84d249a8687ba7132c41573a932a1fb087b778e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x134E4 18728 bytes
font_02_sfnt_off000164a2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x164A2 16792 bytes