Malicious PDF — malware analysis report

Static analysis result for SHA-256 117e265093900466…

MALICIOUS

PDF

73.8 KB Created: 2021-09-12 16:50:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 064e7dbe91d8818d2d76ff5ed68c8cdf SHA-1: 495b46eb8f0814a3fb4d38dbd36572a706e18d1e SHA-256: 117e265093900466aa160cfe7560e57c34c6f54fac15e9ea80c019725f143fec
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which are part of a link farm hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of external URIs and the link farm structure suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://drafthe.ru/uplcv?utm_term=airdroid+premium+activation+code PDF link annotation
    • http://jinruily.com/UploadFile/file/20210908140852517.pdfIn PDF document text
    • http://obras.ru/sites/default/files/uploads/dulakiwezelafuzi.pdfIn PDF document text
    • https://path.mn/userfiles/files/rozuzujadebuliresezugud.pdfIn PDF document text
    • https://marjoyunlar.com/calisma2/files/uploads/79013823501.pdfIn PDF document text
    • https://harkakotony.hu/UserFiles/file/35197719514.pdfIn PDF document text
    • http://pibar.tw/uploads/files/202109030911386381.pdfIn PDF document text
    • http://villa-margherita.biz/userfiles/files/xadimari.pdfIn PDF document text
    • https://stvorki.ru/files/file/lusidedozidozadozif.pdfIn PDF document text
    • http://tfforming.ru/d/files/kiladuwonutesat.pdfIn PDF document text
    • http://vncdata.net/app/webroot/uploads/files/58200906659.pdfIn PDF document text
    • http://hoigolfbinhthuan.com/users/files/24614575398.pdfIn PDF document text
    • http://investgeorgia.ge/userfiles/file/sesiwamiron.pdfIn PDF document text
    • https://m-astar.com/UserFiles/files/popijobimanu.pdfIn PDF document text
    • http://basumati.com/app/webroot/ckfinder/userfiles/files/narababixexajorog.pdfIn PDF document text
    • https://firsatoyun.com/calisma2/files/uploads/65683790974.pdfIn PDF document text
    • https://dogathermalhotel.com/resimler/files/sapewobodovalidonogojemiv.pdfIn PDF document text
    • https://umiyawoodworks.com/fckdb/userfiles/file/naxudivu.pdfIn PDF document text
    • http://ossokahve.com/upload/file/15704842342.pdfIn PDF document text
    • http://purplebyanki-com.bvirani.com/ckfinder/userfiles/files/doborane.pdfIn PDF document text
    • http://elpijisystem.com/file/70244126870.pdfIn PDF document text
    • https://hinodanang.com/uploads/image/files/41838561953.pdfIn PDF document text
    • https://motodubai.com/uploaded_images/files/82359086129.pdfIn PDF document text
    • http://zentrumok.com/userfile/files/busavifujedikodisaxo.pdfIn PDF document text
    • http://vinmexindia.com/uploads/botiwifixegep.pdfIn PDF document text
    • http://backkwang.com/userData/board/file/bofukorexerekik.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_off0000bd8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD8C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d59e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD59E 16936 bytes
SHA-256: 6814107553c91039a9a07752b265154bdb6869b26c0a6a8e89739b0411eaa395
font_02_sfnt_off00010140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10140 10608 bytes
SHA-256: 0f101e9232cc923359307d2d111157eca3de625725947603b7d28ca15b1e6119