Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fb7e6a89a597fd1…

MALICIOUS

PDF

73.1 KB Created: 2021-07-15 23:56:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 8dfbd151f8b1d0af4aae813c28c79208 SHA-1: 784fa2815d7aed223cd42264c41bdd088678a3f5 SHA-256: 6fb7e6a89a597fd16567523f6a8396cb74d4d4ff811cb8eb7254baa71024b59d
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF that contains a heuristic firing for a 'free-download phishing' lure, indicating it is designed to trick users into clicking malicious links. The embedded URL points to an SEO redirector, which is commonly used to obscure the final malicious destination. While no scripts were explicitly extracted, the PDF structure and the nature of the lure suggest potential for embedded JavaScript or other exploit mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8363

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/sq/ugae/~3/gPkW7oTCsL0/square?utm_term=texas+food+handlers+card+answers PDF link annotation
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ee91381cf0e6777f32ea87/1626247481036/59819769811.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec80d20cf33f708d7a1879/1626112210782/fekatanuvevadivi.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f042eb1e1a563dfb91844b/1626358507400/perry_pawn_shop.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f06c2b7865aa574580608f/1626369067839/zigujijamenumajeju.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e7744ecda3d44b1bbda299/1625781326703/6428758092.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f04318b3de5a36b12a7b4f/1626358552368/stenography_meaning_in_english.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_off0000bf63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF63 15904 bytes
SHA-256: 2a506a7362a8c774ee2671db0acfff472bb8af2091e3a78ec3a00c918622bb09
font_01_sfnt_off0000e866.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE866 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001007d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007D 10536 bytes
SHA-256: a00510644dc1c6c533b8cdf3361810c76f45b19f3616beee566caacba8fe4d85

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