Malicious PDF — malware analysis report

Static analysis result for SHA-256 96f849d95d7aad02…

MALICIOUS

PDF

65.5 KB Created: 2021-02-21 08:10:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: fcef5b1f14aab10a7ffa44238b414472 SHA-1: 34d101481f4e3133c88f59d607cd7a1b0f591fbb SHA-256: 96f849d95d7aad026fff08f59878d2dac7861857a0ad5f6651bad7f7f378d25a
196 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
  • 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/wix?keyword=section+14-1+human+heredity+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4485322/normal_5fd1cfd3988a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482870/normal_6031c44ccfed7.pdfIn PDF document text
    • https://cdn.sqhk.co/kekotenonaxu/jfQie8I/piano_keyboard_layout_36_keys.pdfIn PDF document text
    • https://cdn.sqhk.co/lesepivir/0gdjf7T/70365295251.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385427/normal_602e41658a418.pdfIn PDF document text
    • https://cdn.sqhk.co/potiribuwuf/fieCOfq/rush_hour_full_movie_youtube.pdfIn PDF document text
    • https://fifekususelamib.weebly.com/uploads/1/3/5/3/135349053/bosomumaz.pdfIn PDF document text
    • https://cdn.sqhk.co/jerizukop/zZrhin1/74990101916.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/bokofapig/94041849530.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/21721307326.pdfIn PDF document text
    • https://s3.amazonaws.com/pugomonapoxuxe/34729160369.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/amanush_bengali_movie_song.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/69726730.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/temotokojexel.pdfIn PDF document text
    • https://s3.amazonaws.com/rodakarugupoko/oracle_bpel_12c_developer_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/nolarifaforuxop/course_description_template_homeschool.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_off0000c3dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3DC 5680 bytes
SHA-256: 0de766a34970f124bb12fa3d9dc03f122d88f2b9f9866666cccc3f8ed2133b01
font_01_sfnt_off0000d72a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD72A 9796 bytes
SHA-256: ffc4b5c0e126d0f02bd88ecc0b51bb9f0fa65faf50c8c1575bdc3341b4b217b3