Malicious PDF — malware analysis report

Static analysis result for SHA-256 a32a20541116aedc…

MALICIOUS

PDF

214.4 KB Created: 2021-07-21 05:33:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 24c9bba17fe1d9db44e9e7697f068ab3 SHA-1: bad13f4fc72e3fa5a8f38b30f08f7c3f733e2e83 SHA-256: a32a20541116aedcc967bbb87413eef146310b59b6e1817a1875055b04f4b8ff
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, likely intended to host and distribute malicious files. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. Although no scripts were directly extracted, the PDF structure and heuristic firings suggest it's designed to trick users into downloading further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9819

Heuristics 5

  • 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.
  • 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://kayamedbursa.com/userfiles/file/linebapixukonogoxuxetexo.pdf In PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab21625ec0---jibodu.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cfd852a4fe---kinodiwijelonulemefev.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071a6219a444---kigoxezenemub.pdfIn PDF document text
    • http://madonnina.info/userfiles/files/25285957696.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/2a910ecf840bf8eebb43d88cb570d29f/zuxifaduzoluki.pdfIn PDF document text
    • https://www.servicioscalibrados.com/wp-content/plugins/super-forms/uploads/php/files/bcf75c9d2602011795bc75dcf2bc0724/navemidupevemuzatazo.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160861d08bc717---86072471836.pdfIn PDF document text
    • https://mfdesign.hu/files/file/44005754978.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/psb97u0idh23c8tr2hgo75k250/92354444765.pdfIn PDF document text
    • https://srilangkapools.com/contents//files/vakeworefukogopovaz.pdfIn PDF document text
    • http://architettoseneca.com/userfiles/files/getimazawerokavuxitipili.pdfIn PDF document text
    • http://stepasidemedical.com/images/uploads/file/23901895503.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160eca4751da81---13409275943.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/tosaxaduzotidijewapidovu.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fdb7e7831c---93048438971.pdfIn PDF document text
    • http://maility.pl_adresuserfiles/file/47869674558.pdfIn PDF document text
    • http://a-kamen.com/userfiles/file/40818383228.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/acea4ce06c0212487f4e8a7a730935c8/gamurovejagikaveg.pdfIn PDF document text
    • https://sahodayabbsr.com/test/fckeditor/file/saxefesuzerefo.pdfIn PDF document text
    • http://bioscipublisher.com/files/upfiles/file/vanumodaxefidubizuza.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f594a3ce3---47196071570.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bd79b4a1f5e---xedofofoduzosu.pdfIn PDF document text
    • https://aadharshilaschool.org/userfiles/file/dubited.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/ceca875300e34466f6548e3df4445358/tenugima.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=edexcel+igcse+business+studies+student+book+answersPDF 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_off0002e84a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E84A 11048 bytes
SHA-256: 7ae837ce1535d8df6743135f700c6fbeba091c194a064542011a616646d908d4
font_01_sfnt_off000301fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x301FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00031a0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31A0E 18356 bytes
SHA-256: 79c3f8ef76eeec23fc5cb123f85f0789a6288d4b64d3521ca318fb5cd5e1e61f

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