Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e9545301ca84f0d…

MALICIOUS

PDF

85.8 KB Created: 2021-09-06 13:45:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a3aadfeab1e88e2fbbf90ecbf4d72da1 SHA-1: 37e404bfd00daa549a4047150b2999f661686bde SHA-256: 2e9545301ca84f0d389bb5488312b0c837e8936e6c07361f289b57fd2bc8456d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution campaign. The presence of embedded JavaScript, though not directly analyzed for specific actions, further supports the potential for malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://josephlillianmorrisfamily.com/clients/59960/File/41701351389.pdf In PDF document text
    • https://praktijk-fix.nl/userfiles/image/file/10004013079.pdfIn PDF document text
    • https://infotechb2blite.com/bot/ckfinder/uf/files/mubemelebapuwod.pdfIn PDF document text
    • http://qunjl.com/userfiles/files/99933976940.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102eb30b8cb0---73350582198.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/93334cc433da2c030fb3a84c10956362/49028100981.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210809_28615D6AB169041A.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f39b163caf---64911154132.pdfIn PDF document text
    • http://elijasprojekts.lv/files/file/vukulid.pdfIn PDF document text
    • https://smartstone.ca/userfiles/files/4296409000.pdfIn PDF document text
    • http://cipetbhopal.com/webimg/files/62158828328.pdfIn PDF document text
    • http://dalboncostruzioni.it/userfiles/files/liwavidigozajozikugan.pdfIn PDF document text
    • http://nationalcoopadvisors.com/userfiles/files/14478903446.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/21567550907.pdfIn PDF document text
    • http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/32404195330.pdfIn PDF document text
    • http://risme.vn/files/47676842658.pdfIn PDF document text
    • http://ipceurope.com/assets/file/59609139106.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16135426cd3e92---37591056087.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/814890f20935ba71a714b95bacabe52a/jituvusujupojenon.pdfIn PDF document text
    • http://bidadapatidar.com/userfiles/file/8143455529.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131241f82e85---68487513870.pdfIn PDF document text
    • http://jirehenl.com/userfiles/file/210414509603.pdfIn PDF document text
    • https://nexusmediation.nl/files/goluviburupiwej.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=blood+relation+questions+solving+tricks+pdfPDF 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_off0000e219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE219 20800 bytes
SHA-256: 0ecd838c8fcf3393ae2abbd6a5cef27b24de7994dfe005faa8a6472e6f75f969
font_01_sfnt_off0001170b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1170B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F22 11252 bytes
SHA-256: 5b01de84433d6491e8540646e7ddd76baf645cace1e3507aef00dcdbdbae3e42

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