Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6ad8c1d52f4d4bd…

MALICIOUS

PDF

72.3 KB Created: 2021-02-23 01:31:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 1d7423e8d59b2d672b502143656847f5 SHA-1: 25586891aacedc983507cbba94ebac22c92795ef SHA-256: e6ad8c1d52f4d4bdf505ef093b4d593ab9e0aa52dfeb4aad9660a56c683fb81d
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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/strik?utm_term=tylenol+nursing+implications+davis+pdf PDF link annotation
    • https://gupolakeg.weebly.com/uploads/1/3/1/8/131871569/motodol.pdfIn PDF document text
    • https://bajorenurelop.weebly.com/uploads/1/3/0/7/130739037/dalexivajugixunuf.pdfIn PDF document text
    • http://clipshd.design/runulugavinadefuliteq9uka.pdfIn PDF document text
    • https://cdn.sqhk.co/xiroxozalal/jhji1vq/mr_itou_knives_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/dunafafaxen/dhj0ibR/metropcs_phones_upgrade.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488135/normal_6018defa21cda.pdfIn PDF document text
    • https://cdn.sqhk.co/farafakilof/gChaSB3/91605724035.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416514/normal_5fd8b10581ceb.pdfIn PDF document text
    • https://buvewetaki.weebly.com/uploads/1/3/0/7/130775635/8172804.pdfIn PDF document text
    • https://cdn.sqhk.co/dolitife/arrgRM8/metropcs_phone_number_pay_bill.pdfIn PDF document text
    • https://cdn.sqhk.co/bijukipuj/s1jh2f1/rojogiwubov.pdfIn PDF document text
    • https://cdn.sqhk.co/vilitemeru/hZpgjib/fast_food_cooking_restaurants_list.pdfIn PDF document text
    • https://cdn.sqhk.co/keximovib/CwijhcZ/savasilobodepofobe.pdfIn PDF document text
    • https://lalinixew.weebly.com/uploads/1/3/4/2/134265361/gudifesikume-tevul-baredozudar-napufiribuwoz.pdfIn PDF document text
    • https://cdn.sqhk.co/fogibadeku/GlziiMb/75284373718.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dd6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6D 5588 bytes
SHA-256: af80492ca4122bc1faa63f9fca488eebde6f4f7afba3cdc1e786b4eb0ea12301
font_01_sfnt_off0000f067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF067 10440 bytes
SHA-256: 826298a7528276574a15991dee83098424c66f864ded62b08789b89887d648f9