Malicious PDF — malware analysis report

Static analysis result for SHA-256 4987255d29f84dd2…

MALICIOUS

PDF

73.5 KB Created: 2021-02-20 00:37:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 504cdf51cd15121e9784d5e48fa8b3ff SHA-1: d7103b8ec6f35eb91385fa8f3ef90af7e9bd4519 SHA-256: 4987255d29f84dd2b8db30ee7c235c92d27d1a54959ea860616ff1f5db8b3780
136 Risk Score

Malware Insights

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

The PDF document contains a heuristic firing indicating it is a phishing lure, specifically using an image to redirect users to an SEO-optimized link. The embedded URL, 'https://jottigo.ru/wix?keyword=watch+sonic+the+hedgehog+movie+online+free', is presented as a way to watch a movie online for free, which is a common social engineering tactic. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/wix?keyword=watch+sonic+the+hedgehog+movie+online+free PDF link annotation
    • https://cdn.sqhk.co/likamigid/ZlbExrw/mr_ed_jumps_the_gun_smoke.pdfIn PDF document text
    • http://idealica-uficiale.website/physics_books_for_jee_advancedxy7xd.pdfIn PDF document text
    • https://cdn.sqhk.co/sarowojep/lGbjbhc/22424264963.pdfIn PDF document text
    • https://cdn.sqhk.co/duzoxibuf/fihiarF/fijitopaj.pdfIn PDF document text
    • http://netewe9.xyz/marantz_sr5009_remote_appvejfr.pdfIn PDF document text
    • https://cdn.sqhk.co/dilizilozok/ehdggVY/mebeluritawa.pdfIn PDF document text
    • http://salestore.pro/wuguvajewuberitugpjt7.pdfIn PDF document text
    • https://cdn.sqhk.co/kubasovusi/fhhSj9d/download_lively_anime_live_wallpaper_mod_apk.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/wiwamoxamo/bialetti_kitty_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/67106149436.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/62993781783.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/bohemian_rhapsody_chords_piano.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/dmv_test_florida_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/tokit/gidakikidezujatek.pdfIn PDF document text
    • https://s3.amazonaws.com/guvovigo/67854591215.pdfIn PDF document text
    • https://s3.amazonaws.com/nojemi/gopepotepixaji.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/infective_endocarditis_dental_prophylaxis_guidelines.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0C0 5508 bytes
SHA-256: 3bca86cc2cbb802cb53865dff0742fa0b454030617633540b3914afb401760b9
font_01_sfnt_off0000f363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF363 10948 bytes
SHA-256: 292ecb80d14d3712d7d44f4353cee4f6dade40706856cc488b76a3f63c01000b