Malicious PDF — malware analysis report

Static analysis result for SHA-256 1da2b65515b1dc01…

MALICIOUS

PDF

89.0 KB Created: 2021-01-22 16:39:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: d0708571a8627e29199f0200f7a24019 SHA-1: 20e24b5ed422b607c1f1bc85be363e59e404cedd SHA-256: 1da2b65515b1dc0128d941a41c395f3dc77dbcbdfba2cc92db90ddd128ca2a12
194 Risk Score

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
  • 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.
  • 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/aws?utm_term=laryngeal+aditus+forms+the+superior+boundary In PDF document text
    • https://cdn.sqhk.co/vupapevixu/Xmhhejb/retro_cross_color_shirts.pdfIn PDF document text
    • https://site-1248600.mozfiles.com/files/1248600/ajith_kumar_viswasam_photos.pdfIn PDF document text
    • https://cdn.sqhk.co/rosojolude/DgjggBy/ice_princess_wedding_day_mod_apk_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419211/normal_5fe53a8dceff4.pdfIn PDF document text
    • https://cdn.sqhk.co/zabeluzitema/ajaidjj/50619174417.pdfIn PDF document text
    • https://cdn.sqhk.co/kefekawit/3crDtid/frye_shadow_plaid_bomber_jacket.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462065/normal_5ff01ee36fabb.pdfIn PDF document text
    • https://cdn.sqhk.co/zewuxumaro/idujjfG/ono_sve_sto_znas_o_meni_knjiga.pdfIn PDF document text
    • https://site-1178419.mozfiles.com/files/1178419/credit_one_talk_to_customer_service.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408004/normal_5ffd6a9eeb9e4.pdfIn PDF document text
    • https://site-1168150.mozfiles.com/files/1168150/vegopaloxopivabaled.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452193/normal_5fdd2c5f3a9a8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412900/normal_5fe33663317d7.pdfIn PDF document text
    • https://cdn.sqhk.co/libibajuzumu/hwja8gj/53736284318.pdfIn PDF document text
    • https://cdn.sqhk.co/xurawupo/jggideO/repost_instagram_ios_11.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_off00011ff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FF1 5640 bytes
SHA-256: 9ab378596514b4c523a4b28d1619f557c57f567170f63e567a1e39fc4dc555c2
font_01_sfnt_off000132fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132FC 10480 bytes
SHA-256: 3cdd84f2cbaede0adb27ca53e5e8a534be229ce6faead213a5acd177526045ef