Malicious PDF — malware analysis report

Static analysis result for SHA-256 dded7423027ce4b2…

MALICIOUS

PDF

84.7 KB Created: 2021-07-12 20:17:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 4b32ddbd91ba345a0cd29b32ecdd3fe9 SHA-1: 617b7b1a3dbc60b61ec41594ac3019fdaaea9d87 SHA-256: dded7423027ce4b27edbc4f7e78a35415a55cf756c70d34398b2795666f99cd3
76 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains heuristics indicating it is a lure for free downloads, redirecting users to a potentially malicious URL. The ML classifier also flagged the PDF as malicious. While no scripts were extracted, the presence of embedded URIs and the nature of the heuristics suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7164

Heuristics 4

  • 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/jEScUJLm1bs/square?utm_term=flirting+with+your+husband PDF link annotation
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec77f28bb04542cee34390/1626109938735/sikhwal_publication_books_free_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7e6e8a3609a707bac908a/1625810664513/age_to_get_permit_in_texas.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8e7dbe6bd1231e604f83d/1625876443907/dubuzelun.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec716d7e2b627161599123/1626108269331/juxuzatumafuvixutexil.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e949805ebba154a8fda45e/1625901440738/plate_tectonics_crossword_puzzle_answer_key.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8704036ee9e0d9b3cc94f/1625845824822/86389154904.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e79b80a3609a707ba891e3/1625791360732/noras_character_traits_in_a_dolls_house.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d52d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD52D 10812 bytes
SHA-256: 2f332e583f91a8a28cdba5490865fbab706367a5d110bc890921f12fb264215b
font_01_sfnt_off0000edd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDD6 16452 bytes
SHA-256: 583ac83c5792d5ee8c49784fe74a3d7a5f78ab82d1a40da2dddb5a4f95312668
font_02_sfnt_off00011860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11860 16312 bytes
SHA-256: 7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae
font_03_sfnt_off00012e6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E6B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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