Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa0da5bfcafd0392…

MALICIOUS

PDF

76.6 KB Created: 2021-07-14 07:40:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 1966426409faf1c46cff00905a857e4f SHA-1: 388fdb2ff2e6a9f348786af1160b16ece427abaa SHA-256: fa0da5bfcafd0392a3a2eb2f7f96ca18ea84b3f15000c7fd82569740f6793510
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by multiple heuristics as malicious, including ML classification and ClamAV detection, indicating a phishing or trojan threat. The presence of an embedded URI pointing to a Google Feedproxy URL, which in turn redirects to a Squarespace domain, suggests a phishing lure designed to trick users into downloading further malicious content or visiting compromised sites. No scripts were extracted, but the PDF structure itself is indicative of a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://feedproxy.google.com/~r/razvivatel/yapz/~3/0YvHz_IItD0/square?utm_term=how+to+sell+cars+in+story+mode+gta+5 PDF link annotation
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec86cb7e5cd11affcd87d9/1626113739604/fallout_76_classical_radio_playlist.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60eca97a9a1cf201f808912c/1626122618240/78952649724.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e7a2d1adf2c26882fd59df/1625793233367/how_old_is_melissa_gilbert_from_little_house_on_the_prairie.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e931f52f3c4128e18addff/1625895413560/simply_smooth_electrolysis.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60edde86d6ef6771c1dbf69d/1626201734376/ramuniketukovuwivama.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7907f1d61f435cef39091/1625788543658/rate_law_constant.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e7b6ab52059f1ec1e22b5a/1625798315441/meaning_of_prophylactic_treatment.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec7d81bdd82073f6fe6d22/1626111362041/56907828235.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60edcdf7172ba47bdac1e533/1626197495822/75499134340.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec9e6e51a87c5d75ae670e/1626119791013/degunuwagetaba.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_off0000c7d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7D4 16500 bytes
SHA-256: 811cf7235bde08196d5e02e91202b054a05520d012ceeadf7f3b94714369f790
font_01_sfnt_off0000f2fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FB 11036 bytes
SHA-256: 0ac176f27d70be6dc74fccf32b7b5b5def98d4b3af9f54406354e4c098d82030
font_02_sfnt_off00010c89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C89 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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