Malicious PDF — malware analysis report

Static analysis result for SHA-256 34f19527a639f797…

MALICIOUS

PDF

82.2 KB Created: 2021-09-24 03:37:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: be3572e18b185b59137c0e4dfd419710 SHA-1: 129d447c6a582a8b07e674044994a423564dd234 SHA-256: 34f19527a639f797dff2fddeac871648378cb8101b115d08073a53a66b663245
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, which are likely used to host or redirect to malicious payloads. The presence of a link farm and the use of terms like 'download whatsapp apk' suggest a phishing or social engineering lure to trick users into downloading malware.

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 https://irlanc.ru/uplcv?utm_term=download+whatsapp+apk+latest+version+2020+download PDF link annotation
    • http://ciarajewellery.com/editor_upload/file/35167664314.pdfIn PDF document text
    • http://twozonechickenlasvegas.com/uploads/files/bemel.pdfIn PDF document text
    • https://hlj-vibration.com/uploads/image/20210914/files/20210914065133.pdfIn PDF document text
    • https://tradingcall.in/ckfinder/userfiles/files/lazumujebejipewap.pdfIn PDF document text
    • https://mangallagn.com/images/file/54712764342.pdfIn PDF document text
    • http://kazenergy.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1613c09c150cda---ketifadedakoso.pdfIn PDF document text
    • http://kant21.com/userData/board/file/50591174194.pdfIn PDF document text
    • http://thebodyclubonline.com/userfiles/file/nirex.pdfIn PDF document text
    • http://fsgpj.com/upfolder/e/files/20210904155821.pdfIn PDF document text
    • https://xn--hjrnskadeakademien-mtb.se/userfiles/file/luwaxutaredutuwefimofuwi.pdfIn PDF document text
    • http://sethhukumchandschool.com/userfiles/file/mamuwimaba.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/b1tq67b8u9ngrbuartn8kj2sut/27405710697.pdfIn PDF document text
    • http://beauty214.com/uploads/files/202109111155538925.pdfIn PDF document text
    • http://dc-07b6a75bc4d0.breakthrough-physical-therapy.com/userfiles/files/fopazojejateranopiga.pdfIn PDF document text
    • http://jagodkaprzedszkole.pl/userfiles/file/25319154740.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613075c3838a0---47397673044.pdfIn PDF document text
    • http://baovecongtruong.com/upload/files/71065478330.pdfIn PDF document text
    • http://www.parinet.fi/tiedostot/files/43593310418.pdfIn PDF document text
    • https://miguktour.com/FileData/ckfinder/files/20210912_B7D2775DF2CCAB44.pdfIn PDF document text
    • http://budropol.de/Upload/file/8081933204.pdfIn PDF document text
    • http://tech-in.info/bramy/userfiles/file/50511626009.pdfIn PDF document text
    • http://www.museopizarra.com/ckfinder/userfiles/files/rulitelobexunakazeko.pdfIn PDF document text
    • https://odontologosmalca.com/images/userfiles/file/97448064558.pdfIn PDF document text
    • https://www.ksmt.edu.np/assets/ckfinder/userfiles/files/98655889669.pdfIn PDF document text
    • 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_off0000dbc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBC8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3DF 10976 bytes
SHA-256: 7d29b4102cb6fddcb9f03ed555f0cb294da992ec0b4fb34435c45b620b04367b
font_02_sfnt_off00010d5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5D 17820 bytes
SHA-256: 521d0ab62c16c602f0a954a5a1b8b18e525eeb83e139612e99e40d4b7b079c9a

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