Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bb46788a2dfcdda…

MALICIOUS

PDF

85.4 KB Created: 2021-07-12 16:58:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: fad51f4139ece499b9e6c6fce8f6da5c SHA-1: 7c1d35b376a5df1cb813720af0f37654a0955dae SHA-256: 3bb46788a2dfcddad7fb4959e8e7807e92f32d8c5beecebb17dacf8db435e5b7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to multiple compromised WordPress sites, which are likely used to host further malicious content or phishing pages. The presence of numerous links on disposable hosting and the use of UTM parameters suggest a campaign aimed at redirecting users to malicious destinations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1606da489a6850---86243972453.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c495408c19d---fesar.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbcb5eadfa---bejelefovopuvoxorisobel.pdf
    • https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/4d2b96e1191a6a26d9c24200c6a97ab3/jajurulidelu.pdf
    • http://armanetti.com/images/welidi.pdf
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609850971fd74---lenesokijimojolox.pdf
    • http://aire-limpio.com/img/editor/file/puserujetinuk.pdf
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/2062924a067df02f2a6f8b1c497ee746/4583014946.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c45b91ba883---81136016570.pdf
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/1fa8700e482366c01d8b06aedfbf0383/manunesuxojeruvolunalox.pdf
    • http://riskhedgetech.com/uploaded/file/75847162760a0d7d150248.pdf
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/299fc988871cf6c0f6dd826e087f6701/fabezegomekakexidulojuva.pdf
    • https://cevhertemizlik.com/userfiles/files/zipatobe.pdf
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/472c05254764c578182fd23d403600d7/84892322665.pdf
    • http://jinistudy.com/_UploadFile/Images/file/fasikege.pdf
    • https://airbays.com/userfiles/file/zaresobatewafezenigo.pdf
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1608d7a5c3e046---kijavosawara.pdf
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/bff3efcfef4e00c1a6a877e165fce34b/12800716067.pdf
    • http://creativeindustries.ru/uploads/userfiles/file/74320314851.pdf
    • http://mirrorgallery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071548ca346d---fapamofajujalisifelilawog.pdf
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/9tgk91khtdkhm2bpgf9r8sec27/zijowavuligapivazemo.pdf
    • http://nhs1980alumni.com/clients/878257/File/pogufidopotaretupe.pdf
    • http://nmglyxx.com/userfiles/file/25120378069.pdf
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/fe6b9a0ba4bb6205cab5db934cddce2f/11496567154.pdf
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/2d28d966c86c6fbbf61fb2bcbca9990b/kepixibesesef.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=step+up+to+me
    • 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_off0000ee12.bin
e7f2eb44e3ea71c2999b8403fd8b66dc920d2d2fcd7ff5c63768b4c6c6fc5283		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE12 9916 bytes
font_01_sfnt_off00010401.bin
bb44113d8293527473593eb24ffc94e80b6547edd22adfd20e1c84788081e511		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10401 17028 bytes
font_02_sfnt_off00013067.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13067 16792 bytes

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