Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b4f604782c15302…

MALICIOUS

PDF

78.7 KB Created: 2021-04-06 11:20:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: fff66b38cd7e84a35f0ede04a65846d9 SHA-1: 5cbdb46680bffe5b5dc9fdaf8da1b47360a7f6cb SHA-256: 7b4f604782c15302c57efecaa50196726167b6e56dc461db2c1183a2264cdfa4
144 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a lure with a call-to-action phrase, directing the user to an external URL. This URL is identified as an SEO redirector, commonly used in phishing campaigns to obscure the final malicious destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/123?utm_term=lonely+broken+angel+song++pagalworld PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4459057/normal_605aff299dad8.pdfIn PDF document text
    • http://sk-anker.ru/nanda_nursing_diagnosis_for_type_1_diabetes_mellitus1funl.pdfIn PDF document text
    • http://hermidkovo.info/sisibojowabupezo0h52d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368245/normal_60057d2199e6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490269/normal_603eb543b6b7c.pdfIn PDF document text
    • http://goshop32.site/lugegapajidujijibefodwpmd7.pdfIn PDF document text
    • http://lestyprin.online/reading_comprehension_worksheets_a2tr68t.pdfIn PDF document text
    • https://cdn.sqhk.co/resesexiraf/akUX8xv/pikene.pdfIn PDF document text
    • https://cdn.sqhk.co/terodekijur/ijLojf3/poco_x2_gadgets_360_review.pdfIn PDF document text
    • http://bonuwefuganagus.22web.org/91154062308.pdfIn PDF document text
    • https://cdn.sqhk.co/bivosemubo/hhQNajf/avg_free_for_ipad_air.pdfIn PDF document text
    • https://cdn.sqhk.co/datimemovuko/DKgglGT/55794701366.pdfIn PDF document text
    • http://giftcard-sale.store/73084198336621kw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/odia_song_video_2016.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/75452498946.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/govadijosipomirikog.pdfIn PDF document text
    • https://s3.amazonaws.com/xiwevitox/pewaluji.pdfIn PDF document text
    • https://s3.amazonaws.com/voropa/zetavelisusu.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/bafg_antrag_formblatt_2_nachreichen.pdfIn PDF document text
    • http://rovafitazilom.epizy.com/bsc_magazine_may_2020_download.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://scripts.sil.org/OFLIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF62 5464 bytes
SHA-256: 5fbde827a05a0a072f8ba196521e8ddfa7fde40052ea2565c9b34fd8b46d6717
font_01_sfnt_off0000f219.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF219 4048 bytes
SHA-256: 1abe9353902b6ebeab3384b17e1395ab7e1baf8a28e6b7d9f857685275dfa4ef
font_02_sfnt_off00010101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10101 13592 bytes
SHA-256: ed276429b177ffda28c724d99deb87279e21ed1114f85ade28562a728223c24b

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