Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe2ab3353054d613…

MALICIOUS

PDF

84.8 KB Created: 2021-06-29 00:16:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d10eb1f4a35e4846a6aa17cb81d07a47 SHA-1: fdc50c6fa84b048b99c7ffb21caf55094e64cd81 SHA-256: fe2ab3353054d613f1f580ae4da44c75e8544ca617644ac1bedaa006a366de02
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites hosted on compromised CMS platforms and disposable domains, a common tactic for phishing and malware distribution. ClamAV detected this file as 'Pdf.Phishing.Trojan', and ML classifiers also flagged it as malicious. The embedded links are the primary indicators of malicious intent, suggesting the document is designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://insfilings.com/skyzone_classic/upload/files/gerirodazizotazez.pdf In PDF document text
    • http://joy05.com/_UploadFile/Images/file/gelafixezorojak.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160ac919ecd7d2---xefoxidi.pdfIn PDF document text
    • http://apsons.eu/files/file/fokutiwuz.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a035264bb1---57869445288.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/0e52b74955db952d2a58842b6a85777a/5520512068.pdfIn PDF document text
    • http://farmaciafoglia.eu/userfiles/files/mopidugelofupobus.pdfIn PDF document text
    • https://www.ltgpartners.com/wp-content/plugins/super-forms/uploads/php/files/26d00a50f04a8ceb5381deb4632e558e/sitopafivategowe.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16081125ef0229---58899198064.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160869fff26039---vezarutowutofavujemamifu.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/q47o392b0jmi4237kjo4pj8nf5/89464930729.pdfIn PDF document text
    • http://biomassasia.net/data_ed/userfiles/file/vewiboxajugikap.pdfIn PDF document text
    • http://duszek-lasu.pl/userfiles/file/74413467220.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbffc74e20---pugilogedixakesofitamo.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/51b0a854a3689c7be17d6dae767b08d7/66306386606.pdfIn PDF document text
    • http://vector-luczak.pl/new/fck_user_files/file/34812135061.pdfIn PDF document text
    • http://skncn.com/u/files/78761256799.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/0b00896a554fedea9072623ed28a96fc/21614111718.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-5-3/20210503140809801764.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/2ee1d1876e7120a031db25bf8acbd523/93499353013.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/0b46f5b4380da145d3d4af2fed79377d/detepaluzokim.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160abca0c1ef92---90816088362.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=meaning+of+share+buybackPDF 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_off0000e745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE745 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ff5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF5C 10912 bytes
SHA-256: 704ec80e4eccc7d3b0d6412eaa8c770ea8907e818a831b4992fe288dad8992c1
font_02_sfnt_off00011891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11891 17368 bytes
SHA-256: b936f11ae89c20452d51556fcdd910c2b15ffb97ff73622b9eda65b82d04bbfe

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