Malicious PDF — malware analysis report

Static analysis result for SHA-256 732a42fb6e431a0c…

MALICIOUS

PDF

69.4 KB Created: 2021-09-27 01:27:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: e646195197bd0172827f2330490c5150 SHA-1: 0f63b0c3a6c736372b9956d39f322ec38436d30a SHA-256: 732a42fb6e431a0cf65f1a8dbbc013b0788499bcf9ffec2d32b5c1a11dfb2d31
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV detecting it as 'Pdf.Phishing.Trojan'. The document contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a URL with 'utm_term=how+to+get+ip+address+on+android' indicates a potential lure for information gathering or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://pixomot.ru/uplcv?utm_term=how+to+get+ip+address+on+android PDF link annotation
    • http://www.gyndoktors.de/ckfinder/userfiles/files/38207683072.pdfIn PDF document text
    • http://sangtaoad.com/uploads/userfiles/file/45919390706.pdfIn PDF document text
    • http://fsf-vastroad.com/userfiles/file/tudol.pdfIn PDF document text
    • http://thingsantiquesla.com/userfiles/files/67577283788.pdfIn PDF document text
    • http://sooclose.eu/upload/File/17745257519.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149dd4cb594d---gaxawanelo.pdfIn PDF document text
    • http://chistogood.ru/admin/ckfinder/userfiles/files/fekop.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614fdc075b852---43488204340.pdfIn PDF document text
    • http://gbfrjournal.org/pds/userfiles/files/5319964899.pdfIn PDF document text
    • http://baovekhucongnghiep.com/upload/files/mukopaguj.pdfIn PDF document text
    • https://xn--atpta-nfb.lv/images/userfiles/files/joxubunumolusalaxotawo.pdfIn PDF document text
    • https://markyatirim.com/resimler/files/wovove.pdfIn PDF document text
    • http://chinastom.ru/userfiles/file/74744953105.pdfIn PDF document text
    • https://eghamatyab.com/basefile/bainbookcom/files/rixefuporapidexogagonu.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/jazosumozu.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/b3b3e799eef8d03e2bcc3b1060924b0b/44877824940.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/vineg.pdfIn PDF document text
    • https://infotechb2blite.com/bot/ckfinder/uf/files/sefujofakefipifamej.pdfIn PDF document text
    • http://zhuoer.ltd/userfiles/file/32726925368.pdfIn PDF document text
    • https://www.wizzfizz.com.au/application/third_party/ckfinder/userfiles/files/84003678650.pdfIn PDF document text
    • https://santechnikosdarbai.lt/images/files/82137837694.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/e3cae0f8cb2b227e804c579a2c55f66b/gilajarazelod.pdfIn PDF document text
    • http://hitelesen.com/userfiles/file/77973209695.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_off0000b1ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1EA 14872 bytes
SHA-256: 585c47507e3f602270d21287d5165f2ce2ff5851071a4c5cdf36f818ef2e112d
font_01_sfnt_off0000d758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD758 10596 bytes
SHA-256: 22ca7c96f7646fa566d24bfa703989db7ba088534a254e0a2683a36811614578
font_02_sfnt_off0000ef85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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