Malicious PDF — malware analysis report

Static analysis result for SHA-256 5901e72928c92c5c…

MALICIOUS

PDF

70.0 KB Created: 2021-10-02 15:22:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: a1a9fc2c3a6cce0c28bc72eebe37d2b9 SHA-1: 9b068582749f12ff6d838bc1e9ab2833f2e9519a SHA-256: 5901e72928c92c5ce6dc2d0950d767ed4482717011272bcbc534d792de52358c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to suspicious domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://czechdidgeridoo.com/admin/upload/file/83364796076.pdf In PDF document text
    • https://pakianco.ir/data/image/uploads/news/files/todepi.pdfIn PDF document text
    • https://ventadeterrenosagricolas.com/userfiles/file/xokigipijemur.pdfIn PDF document text
    • https://perfecthospital.net/ckfinder/userfiles/files/tamokuvuzuxif.pdfIn PDF document text
    • https://cuichi177.com/uploads/files/202109050514215474.pdfIn PDF document text
    • http://komodovo.ru/upload_picture/69989060776.pdfIn PDF document text
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/100b6fdc4307fe879468e33b2c8c53f4/60038849387.pdfIn PDF document text
    • https://bahispesinde.com/gnc/veri/_files/86233273057.pdfIn PDF document text
    • http://hytechplus.com/userfiles/file/xulobaxuvobanizo.pdfIn PDF document text
    • https://smartstone.ca/userfiles/files/bowupotumuz.pdfIn PDF document text
    • http://skomi.ru/img/files/file/86910375093.pdfIn PDF document text
    • http://ugyvednok.hu/userfiles/file/bepetuvepakogubegomilo.pdfIn PDF document text
    • https://thefencedocumentary.com/adminfiles/file/85118692420.pdfIn PDF document text
    • http://www.mmd.ntou.edu.tw/ckfinder/userfiles/files/75364680002.pdfIn PDF document text
    • https://uzmanwebci.com/calisma2/files/uploads/laregivibeviga.pdfIn PDF document text
    • http://airserbia2009.vs.rs/multimedia/file/topoda.pdfIn PDF document text
    • http://manilag.com/FileData/ckfinder/files/20210909_A91549371D5A206C.pdfIn PDF document text
    • http://bjhtdszdh.com/v15/Upload/file/202191154887769.pdfIn PDF document text
    • http://castudio.eu/userfiles/files/tagamozeb.pdfIn PDF document text
    • http://hotdeals24x7.com/ci/userfiles/files/10598704795.pdfIn PDF document text
    • http://finemetal-cn.com/upload/files/pajurejosirewufifagasak.pdfIn PDF document text
    • http://enewind.com/pliki/file/90668110117.pdfIn PDF document text
    • http://gojjang.com/uploads/files/8672968344.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=in+morning+dew+poem+questions+and+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_off0000af7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF7B 10972 bytes
SHA-256: 4ece2dd6ebc7f166b3c4af23fa1f350027405df728b8e579beaac5a6bd2948b6
font_01_sfnt_off0000c874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC874 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE086 16372 bytes
SHA-256: f15ac55fbc4dab88b6e85fa20df7694c370b78cedd01e8d4847b13b9e7e5eef8

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