Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d947aab3cafe119…

MALICIOUS

PDF

82.1 KB Created: 2021-09-08 12:20:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: e1986fc34a2307cb0986eff7dfd20673 SHA-1: 9a71f14e5ad043623538509ef5d50efbf9ce2aeb SHA-256: 3d947aab3cafe1194403cec4ce92278ecc5de2a1839a42a68f35daf2563b2d90
126 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://robfredo.com/userfiles/file/33180090005.pdf In PDF document text
    • https://cornwallstaffagency.com/userfiles/file/91574612099.pdfIn PDF document text
    • http://photo-preiss.com/upload_files/files/86978883005.pdfIn PDF document text
    • https://samowar.ch/upload/file/wataf.pdfIn PDF document text
    • http://hitecds.com/userfiles/file/ruxebojaxirugab.pdfIn PDF document text
    • http://antonio-pelella.eu/userfiles/files/xizamivebujevixutomud.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ea1467c57b---kurew.pdfIn PDF document text
    • http://ngocphuocjsc.com/public/default/ckeditor/files/97423896300.pdfIn PDF document text
    • http://traslochimontalto.it/userfiles/files/73289238177.pdfIn PDF document text
    • http://baheth24aqari.com/ckfinder/userfiles/files/59659133174.pdfIn PDF document text
    • http://bigbazar.cz/is/images/FCKeditor/File/kevisamep.pdfIn PDF document text
    • http://caycanhtuyhien.com/uploads/image/files/tuworizezajoriwivi.pdfIn PDF document text
    • https://tranhtreo.com/images/ckeditor/files/pojakiwuputeras.pdfIn PDF document text
    • https://debden.org/userfiles/file/In PDF document text
    • http://kingsfci.com/userfiles/file/49444709213.pdfIn PDF document text
    • http://www.johnrealestate.in/ckeditor-ckfinder-integration/uploads/files/48271646303.pdfIn PDF document text
    • http://rkmaster.ru/uploads/files/83650595785.pdfIn PDF document text
    • https://hagabb.ro/ckfinder/userfiles/files/fuzedurununojunovasimoto.pdfIn PDF document text
    • http://hanmih.com/userfiles/file/20210907023556.pdfIn PDF document text
    • http://kubkao-kubpla.com/userfiles/files/kubipitularaze.pdfIn PDF document text
    • http://ateliergermain.club/sites/default/files/file/kamibasopaxawolafaga.pdfIn PDF document text
    • http://fabiocaronearchitetto.com/userfiles/files/gutedojujolagufazerukotu.pdfIn PDF document text
    • https://v-rshine.com/upload/images/files/nixewukibotoferukujejab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=isotretinoina+embarazo+pdfPDF 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_off0000d974.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD974 18772 bytes
SHA-256: 57db8956fa9e818e9f97fb1ef2b78efcc1bf4f6b9bca89148ceb6e1248e640a4
font_01_sfnt_off000108ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120E5 10764 bytes
SHA-256: 24fffe8e75ac8c301b2307b189ba677bebd70061c86fe8fdc3e98b569c3aaee3

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