Malicious PDF — malware analysis report

Static analysis result for SHA-256 1343bf7e738b9b53…

MALICIOUS

PDF

80.8 KB Created: 2021-09-02 04:20:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d77c3e0e3c86db391bbdb3546ec7de33 SHA-1: a209c1a084c44ac9e769b96ce6975574d52fb1a0 SHA-256: 1343bf7e738b9b5353fc7904945c77dca33a3b17e46532db189622594a45159d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to lure users to malicious content, likely involving embedded JavaScript for exploitation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/e849b8aa550c32e488a4a723ad4c497b/68727566193.pdf In PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/01ghget5m2lmgkeptv32ecfi6c/famotagebewiza.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/sibifexo.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16083674a65473---24968746768.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/09cgqhk9ald1pgr4bqi44chlue/87331324714.pdfIn PDF document text
    • https://artenika.pl/fck/file/34034442253.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f0684be6a54---pugolabumopuf.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/gapujiviwiz.pdfIn PDF document text
    • https://thefertilizergranulators.com/d/files/nixevatezetejibanotorim.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/98505004788.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//zadunulodowazamiw.pdfIn PDF document text
    • https://verlauf-ekb.ru/admin/ckfinder/userfiles/files/89877908482.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/t6oa2doe2gcq35n3biros9ig5vmpgm98/lilukugozujig.pdfIn PDF document text
    • https://whiteplacard.com/UserFiles/file/zirobitapito.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c93327536---gukekajozowogowogafato.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/bf450e1861ed784f1d5998a2e74209c7/tebujawababevetusegix.pdfIn PDF document text
    • http://giadinhlaurenso.org/upload/files/zetoraluzuteru.pdfIn PDF document text
    • https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/a08c29201c67618dd56e911cee6c44e7/pawivuvosapepotafumozem.pdfIn PDF document text
    • http://csc0311.com/userfiles/file/20210714054148_ix510s.pdfIn PDF document text
    • http://mrpokedb.com/uploads/files/zabibunigafesop.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/kedonizumado.pdfIn PDF document text
    • https://haps.company/wp-content/plugins/super-forms/uploads/php/files/ba9gkgo8tjrq8lnbtgi7b00n27/89621287069.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=aap+to+busPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA90 17596 bytes
SHA-256: b03b55843e2f0727788155a4dabc059d70939b96c7544b4befd41a20d0f03264
font_01_sfnt_off000107e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E3 9992 bytes
SHA-256: fd710a3947f7396e2af9fa592ce6b91fb3f432c04990dd9cf16f69a93b9884d9
font_02_sfnt_off00011e00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E00 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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