Malicious PDF — malware analysis report

Static analysis result for SHA-256 79f03c082c2b2702…

MALICIOUS

PDF

80.3 KB Created: 2021-09-17 14:47:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3fe96877f473dee7a25629677001d71d SHA-1: dd6c44d393691883742db9b9f1514fe1df050a1c SHA-256: 79f03c082c2b27023e1649475c1a344e18dc9cd5eb099f376695c8da794c4df0
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The sample was flagged by a machine learning classifier and ClamAV as malicious. Heuristics indicate it functions as a link farm, impersonating cloud services to trick users into clicking embedded URLs. The document body is heavily obfuscated, preventing a clear understanding of its specific content, but the overall pattern suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 6

  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • 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://handsonmontessoripk.com/userfiles/files/32334921571.pdf In PDF document text
    • http://www.beautyvogue.ch/Files/file/18006980415.pdfIn PDF document text
    • https://hbphoto.ca/resimler/files/7643113043.pdfIn PDF document text
    • http://www.ecostroyservis.ru/File/5709221238.pdfIn PDF document text
    • https://vleek.com/uploads/files/10019914619.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16140c5185bb04---15312449259.pdfIn PDF document text
    • http://businessvaluationapp.com/fck_files/file/72311901902.pdfIn PDF document text
    • https://iwistw.com/upload/files/netemuralemimawimu.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/toruxobevoxovizinilin.pdfIn PDF document text
    • https://malabarmail.com/ckfinder/userfiles/files/zizajakegefesikozu.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/161367b2d06f34---difudowojutomolesoroso.pdfIn PDF document text
    • http://eko-uklid.com/files/file/kenuralemipozivam.pdfIn PDF document text
    • http://dongshengcable.com/images/upload/File/41170901084.pdfIn PDF document text
    • https://citronixdeflection.com/nbloom/fckuploads/file/tikimabiwufujixaxut.pdfIn PDF document text
    • http://adice-area.com/pictures/files/tafeforuvovewamado.pdfIn PDF document text
    • http://coquicart.com/ckeditor/ckfinder/core/connector/php/uploads/files/56517402243.pdfIn PDF document text
    • http://generaltubi.com/container/ckfiles/files/20220169269.pdfIn PDF document text
    • http://xn----otbb6ahq3d.xn--p1ai/ckfinder/userfiles/files/sukilifinuwugovoxove.pdfIn PDF document text
    • http://busangh.com/attfile/fckimg/file///20210914175617_1054596774.pdfIn PDF document text
    • http://edusfera.pl/upload/file/50069014484.pdfIn PDF document text
    • http://446888.top/userfiles/file/25162100620.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=xps+viewer+androidPDF 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_off0000d49a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD49A 10400 bytes
SHA-256: 24936de01828d3fa476de0b8b432dd64da5a7c3464a3d11b9d0b98bf566556ea
font_01_sfnt_off0000ec4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001045c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045C 18324 bytes
SHA-256: 2e7ba10b3cf2a760cb6f07095cdd425bece085c8595dfa87129fa84c1a4ddd81

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