Malicious PDF — malware analysis report

Static analysis result for SHA-256 b92d6356f80b046f…

MALICIOUS

PDF

82.5 KB Created: 2021-09-12 19:22:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 144fc008669551f6baf7295968b31b38 SHA-1: d4bb6baf4f57c94ede3f2b77153508585bba735b SHA-256: b92d6356f80b046ff4853b19ae30eb3105b91d38687dc5b8c5be8607d6e5fa28
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document's primary purpose is to redirect users to a large number of external, potentially malicious, URLs. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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 http://abnicum.com/files/file/83596976381.pdf In PDF document text
    • http://watdoenwevandaag.nl/upload/depukupetusezusozuvepak.pdfIn PDF document text
    • https://selispin.com/calisma2/files/uploads/rimilarafiximirorujiri.pdfIn PDF document text
    • https://biholka.cz/uploades/userfiles/file/bexovozasebufi.pdfIn PDF document text
    • http://advocaatindex.nl/images/uploads/wanepazugixokivafuw.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/142834723613cd27c830f9.pdfIn PDF document text
    • http://idroter.org/userfiles/files/7317699896.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/9f672e5f68c6bc7844d99acc4833fc18/gamurisupus.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/31620854913.pdfIn PDF document text
    • http://rakkhunnursinghome.com/user_img/files/29878949621.pdfIn PDF document text
    • https://wanfutemple.urwaydesign.com/data/file/userfiles/files/55203046839.pdfIn PDF document text
    • https://sakura-bashi.com/uploads/files/202109040703557789.pdfIn PDF document text
    • http://retrolondontees.com/userfiles/file/42478889292.pdfIn PDF document text
    • https://associazionemusicaviva.it/uploads/file/ratisilisobobaxujitij.pdfIn PDF document text
    • https://protradingindia.net/userfiles/file/11255315468.pdfIn PDF document text
    • http://ppogrimall.com/upload/editor_image/file/rakonajowonebedosisovadez.pdfIn PDF document text
    • http://www.wcd.com.tw/ezadmin/ckfinder/userfiles/files/fajefupuxored.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/gok6e8kqfrog4i26dhkqgq284a/20001935717.pdfIn PDF document text
    • https://datatech-int.com/userfiles/file/79225717263.pdfIn PDF document text
    • http://sutinlawkrabi.com/ckfinder/userfiles/files/63584346683.pdfIn PDF document text
    • http://acrclubinversores.com/files/galeria/files/fiximewuxujonomov.pdfIn PDF document text
    • http://pjteam.hu/uploads/niteniriwoluzosajofev.pdfIn PDF document text
    • http://bakefruit.com/uploads/files/202109050826284270.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=soccer+ball+physicsPDF 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_off0000df93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF93 17404 bytes
SHA-256: e9a25b518a1b64c386eaface30a896648d7f36e472379c2558b4f06470951ca2
font_01_sfnt_off00010c58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C58 10596 bytes
SHA-256: 19b04ccedcf33f4bf070d934f6d6bd093f81df6a325e0fe126fc6d8a4386be22
font_02_sfnt_off00012469.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12469 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.