Malicious PDF — malware analysis report

Static analysis result for SHA-256 7196f6856dbdb5a6…

MALICIOUS

PDF

82.9 KB Created: 2021-09-10 16:03:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: d0258e15f815aa8447c8093292304212 SHA-1: cc957bc85171f958b51fed3131d4eca2f773d47f SHA-256: 7196f6856dbdb5a68a63fffc552a1947e1647c2a69d910f2179398f8771fd1f8
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic strongly suggests the document instructs users to copy and paste commands into a shell, a common technique to download and execute secondary payloads. The presence of numerous external URLs, including one pointing to a link farm on disposable hosting, further supports a malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://synerhu.ru/uplcv?utm_term=how+to+retrieve+deleted+call+logs+on+android PDF link annotation
    • http://xn--h1acbpobggs.xn--p1ai/data/files/zefivomaxijavewim.pdfIn PDF document text
    • https://webornate.com/viking1/uploads/files/76949167180.pdfIn PDF document text
    • https://greenlandpark.com/uploads/files/79382412704.pdfIn PDF document text
    • http://tungalag.mn/userfiles/files/81147067459.pdfIn PDF document text
    • http://www.gyndoktors.de/ckfinder/userfiles/files/48056106046.pdfIn PDF document text
    • http://roomyab.ir/basefile/roomyabir/files/wawasonolememizatig.pdfIn PDF document text
    • https://eletroluz-al.com/_IMG/img_internas/file/27793547916.pdfIn PDF document text
    • http://buyo-g.net/userfiles/file/65744468790.pdfIn PDF document text
    • http://chemicalengineers.ie/images/memazuwe.pdfIn PDF document text
    • http://www.peritaonline.es/ckfinder/userfiles/files/tojexobate.pdfIn PDF document text
    • http://teresachild.com/upload/files/bawonasimeramawerume.pdfIn PDF document text
    • https://cihangirhotel.com/upload/ckfinder/files/lovidotidi.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/giwulifififo.pdfIn PDF document text
    • http://youngdongtec.com/userfiles/file/52734916797.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f19a42f58c---38336001581.pdfIn PDF document text
    • http://www.impactit.in/ckfinder/userfiles/files/96405680853.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021090210082773499.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/ki6dqqas7uesi64vluq4m75g10/donikekupefogajuze.pdfIn PDF document text
    • http://investgeorgia.ge/userfiles/file/nesuvosexabejikijomat.pdfIn PDF document text
    • http://teusz.pl/UserFiles/file/85931802367.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_off0000dd0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD0D 10688 bytes
SHA-256: 93ef5ba230d820e6c6c2dfa9db7af6affd5c2eef6462b127a4587a3ea4d9ed6e
font_01_sfnt_off0000f573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF573 18720 bytes
SHA-256: 0b998abd21a945e8f179c8bf09032568d18931e8dcfe1b85fccbecc407d1816b
font_02_sfnt_off0001262b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1262B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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