Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd032ee55246d492…

MALICIOUS

PDF

74.3 KB Created: 2021-02-08 08:54:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 6e3d2ef3a5d707959947afffcd60f5bb SHA-1: 40e2f112a337fd9dda7619cb0c7b908cb44f52d6 SHA-256: dd032ee55246d492ed1c254af99d9c3a76c3e6ffef2b3e391a478bc0f653d414
254 Risk Score

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://crophysi.ru/wb?keyword=baltic%20countries%20travel%20guide In PDF document text
    • https://cdn.sqhk.co/foseziwate/ageVWhj/zasisip.pdfIn PDF document text
    • https://vobanugan.weebly.com/uploads/1/3/5/3/135340106/f7cb50580dce99.pdfIn PDF document text
    • https://regutipedazuvi.weebly.com/uploads/1/3/1/0/131071249/9b411d46f1ab8.pdfIn PDF document text
    • https://cdn.sqhk.co/tegatiwuwax/U6Fpb7Q/flip_phone_keyboard_for_android.pdfIn PDF document text
    • https://totijavefukaja.weebly.com/uploads/1/3/4/7/134705726/3826095.pdfIn PDF document text
    • https://cdn.sqhk.co/pivifilogopa/fN6ig6o/76491658406.pdfIn PDF document text
    • https://junipupupu.weebly.com/uploads/1/3/4/7/134739756/kutawenuduw-waxugowivabuju-minajemukeru-bumodapu.pdfIn PDF document text
    • https://pusuwane.weebly.com/uploads/1/3/5/3/135346572/bd331a5a10c3.pdfIn PDF document text
    • https://xufujakuzizam.weebly.com/uploads/1/3/5/3/135315974/edcf8101.pdfIn PDF document text
    • https://fowerorizer.weebly.com/uploads/1/3/1/8/131856705/1224500.pdfIn PDF document text
    • https://bewotenugajuvu.weebly.com/uploads/1/3/2/6/132695730/bedegapul.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/liguwubore/98448845108.pdfIn PDF document text
    • https://s3.amazonaws.com/pegebunov/vmware_vsan_design_and_sizing_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/86120762975.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/dragon_ball_z_final_stand_android_build.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_off0000e55a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE55A 5216 bytes
SHA-256: b416d14f24f814c34b58929e2b50cfb5faabd19c0dc4022423bf4986acc849a6
font_01_sfnt_off0000f72a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF72A 11164 bytes
SHA-256: 5892cfea3fa9bc5742bdf6be6fc09b8302e2670d4627f5b4da2de5d048fac576

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