Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e92afda562b0c60…

MALICIOUS

PDF

83.6 KB Created: 2021-09-29 06:42:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7903cda4ab6c14777a708e9764c12cb3 SHA-1: 6d24f4729b6d35c54101632142a37e15fb4c5331 SHA-256: 0e92afda562b0c6066a1ce169a9a671d6d69a0bc2a78e2b764c9f79eb37fe789
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of external URLs, many of which are hosted on potentially disposable domains, indicating a link farm designed to distribute malicious content or phish users. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external links suggest it is intended to lure users to malicious sites, likely via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9931

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://childprotectionindia.com/lexcyberia/userfiles/files/65455326788.pdf In PDF document text
    • http://lgassociates.in/uploads/gonefitimasunitolad.pdfIn PDF document text
    • https://davaocarrental.com/images/file/75982587243.pdfIn PDF document text
    • http://lnhaihui.com/userfiles/file/20210920014542_2041905002.pdfIn PDF document text
    • http://smelawservice.com/file_media/file_image/file/67870533633.pdfIn PDF document text
    • https://www.lesson-online.org/wp-content/plugins/super-forms/uploads/php/files/eq309he2r0qv6ss9fig77pp0q0/wobepizerepomelapinolotod.pdfIn PDF document text
    • https://resttour.com/images/userfiles/files/76554218886.pdfIn PDF document text
    • https://regaluxiluminacion.com/uploads/assets/file/12798619743.pdfIn PDF document text
    • https://renewone.de/files/74078682444.pdfIn PDF document text
    • http://belstroyiz.ru/img/file/rarabuwe.pdfIn PDF document text
    • https://www.paseppe.gr/ckfinder/userfiles/files/xanerumilupejufe.pdfIn PDF document text
    • https://www.sudoku-cool.com/ckfinder/userfiles/files/92815463302.pdfIn PDF document text
    • https://estudiowebcolombia.com/ckfinder/userfiles/files/33784093110.pdfIn PDF document text
    • http://dieukhactransam.com/uploads/files/jarajerederux.pdfIn PDF document text
    • http://grafichesirio.com/userfiles/files/tejesezunebowav.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/87428415608.pdfIn PDF document text
    • https://linhngapt.vn/upload/files/14785813384.pdfIn PDF document text
    • https://ijfbacknumber.com/editor_up/dexorori.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140101a55fea---doretefevepotavigaduw.pdfIn PDF document text
    • http://botaierpharm.com/upload/files/fitotopulaguzegu.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/gosuwibaketizotolumakiwes.pdfIn PDF document text
    • http://domesticsolutionsagency.com/userfiles/file/38463889474.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=types+of+muscular+systemPDF link annotation
    • http://irodori.kir.jp/files/file/25141905890.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000ef26.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xEF26 18428 bytes
SHA-256: 4fb2f84e060fc21ab6d3b92e61c957aff5ecd1333de45a70d985803b64dc2e37
font_00_sfnt_off0000bea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEA6 10624 bytes
SHA-256: 78718a79e0f50fcc95eb4c217bc6719938af3c200b74a16cfb0d1fafbdd1722e
font_01_sfnt_off0000d715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD715 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00010c92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C92 19836 bytes
SHA-256: 22a1c5ac95dcfda2643e06615e200cf19eec42bf2ecb34039b3a533320d4a1fa