Malicious PDF — malware analysis report

Static analysis result for SHA-256 e744b0568c573900…

MALICIOUS

PDF

92.4 KB Created: 2021-07-28 09:51:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ff89fb2b81f28d1c5af43520537c2e47 SHA-1: 75fb27baaafefe99070e2937d9e6db8da45f7b25 SHA-256: e744b0568c5739003f7bb0743313505ccf00c5ee763ed5ef6fa8f167fcdfaf28
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains JavaScript actions and a large number of links, many pointing to potentially compromised websites. The presence of JavaScript suggests an attempt to execute malicious code or redirect the user to a malicious site. The ClamAV detection and ML classifier further support its malicious nature, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9786

Heuristics 7

  • 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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/16072f13c5617b---93628515364.pdf In PDF document text
    • http://epicridesnepal.com/files/50425156693.pdfIn PDF document text
    • http://clair-environnement.eu/catalogue_dynamique/file/xujikaxorudemizugipipigum.pdfIn PDF document text
    • http://nage-z.com/ckfinder/userfiles/files/25219011263.pdfIn PDF document text
    • https://harom.ro/files/file/33413727705.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/6lhkl05aqj2154no925588ts65/romid.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/gokawugagepanesur.pdfIn PDF document text
    • http://clarkhigh72.com/clients/3/34/34275c7d49a174b5f6cf03bf5966da6c/File/nexaninelova.pdfIn PDF document text
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/950447f6d00431d39a1093a15dedd323/17587523385.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/3a8a9a3dd1eb932adae285a09db0324a/sarikuki.pdfIn PDF document text
    • https://condominiobrisasdelnorte.com/userfiles/file/gatoxenafupinujori.pdfIn PDF document text
    • https://keluargamimpi2.com/contents//files/41438658005.pdfIn PDF document text
    • http://ekogamma.pl/javascript/ckfinder/userfiles/files/66294609186.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096cae69f913---90721688974.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606d41fa8a343---98904040711.pdfIn PDF document text
    • http://biaikatolikus.hu/files/file/zimanune.pdfIn PDF document text
    • http://www.abcklima.hu//data/editorfile/31583030081.pdfIn PDF document text
    • http://tdbakademi.org/userfiles/files/2462794486.pdfIn PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/fopugetuduvugaj.pdfIn PDF document text
    • https://dacola.com/upload/files/lusar.pdfIn PDF document text
    • http://noithatsah.com/webroot/img/files/domigovurefunufog.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/q2o37slubjjruv14qdhq5n5620/fopoxakajepepud.pdfIn PDF document text
    • http://arnold-sitter.com/CKEdit/upload/files/nisegonabizejaxij.pdfIn PDF document text
    • https://aryaayur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c379fc3341a---gudexegiwidafemasi.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/ueh8h4d9e702g6l419pcav4e6n/lasubujiwib.pdfIn PDF document text
    • http://lookkorea.net/userfiles/file/38675520604.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=dilation+and+scale+factor+worksheet+kutaPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00014462.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14462 18592 bytes
SHA-256: c32c792ee2bfe14cd290d3d1768ee646c810f3e6e9a328503813bb5ff75e16d0
font_00_sfnt_off0000eb0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0C 15796 bytes
SHA-256: 37ad331306e5e174af31b4583699693e530e02f251594dd632d4140befe2d00b
font_01_sfnt_off0001133c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1133C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B53 10852 bytes
SHA-256: c5ba955ac16681fcb4e40eb8b9248c37ef2f7715c63e1b7ec4b8c4b59afd1f89

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