Malicious PDF — malware analysis report

Static analysis result for SHA-256 e16499edf204505f…

MALICIOUS

PDF

204.7 KB Created: 2021-07-19 02:26:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: a5c2996bc8e346cb76f58a3c41a70a40 SHA-1: 04f695489f6a2f6f23191c77d2f653c1a168b13f SHA-256: e16499edf204505f45311eaa9b0f64444efdd5123f946be0f126337e3d9c394b
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains heuristics indicating it's a phishing lure, specifically using an image to redirect to a URL. The ML classifier and ClamAV detection further support its malicious nature. While no scripts were directly extracted, the PDF structure and embedded URI suggest an attempt to trick users into visiting a potentially malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8838

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/hIkXU_AiHkM/square?utm_term=new+moon+witchcraft PDF link annotation
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec9d25934d360eb28aa5e5/1626119461694/79593806764.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e930c6025aa46e30d34e61/1625895110916/meaning_of_lackadaisical_in_english.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f22c2d5c8a935ec3c8d6d4/1626483757400/widakokajijowesusixuzole.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f2dcd2cba7b71501e10346/1626528978496/fire_and_blood_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec7a3cef188817f7e078a5/1626110524415/42923463280.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60efce1e97dca740078bc377/1626328606643/78034570130.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f055293159f50439c70407/1626363177625/pdf_annotation_app_android.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60edb4b8920f291d39229c2a/1626191032815/boat_and_pontoon_rentals_near_me.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f0bdc55142327a873b9f5f/1626389957670/toasted_pecans_in_oven.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee4ae52d09e34b72a11a24/1626229478125/second_order_ordinary_differential_equation.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 2

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

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000297b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x297B3 10448 bytes
SHA-256: 884fa8ea708d0b842e4558971c65218bbdd366159a9e511e385e1fee396e72a9
font_01_sfnt_off0002af39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AF39 17856 bytes
SHA-256: 335df9adfdf6ea06291f811d6b870a1869b39a7f988f588d66030af71770e1c8
font_02_sfnt_off0002cb1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CB1C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0002e32e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E32E 22892 bytes
SHA-256: 39ecb10b7722ec00e6799b9da44565753a928f1f074a11f98635c867c61dd94d
font_04_sfnt_off00031ce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31CE7 1792 bytes
SHA-256: 023d494d9166b211199a5583ab7e2ab5626d8b9b5b79d6a0a3d8857e1fc0526a

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