Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f8b70620f969de7…

MALICIOUS

PDF

69.9 KB Created: 2021-02-23 00:30:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 26afd6eb8b0392fb026dee3abc85c38f SHA-1: c4208af67ba7239fcb8743ccbee5cf2c1e01de0c SHA-256: 5f8b70620f969de73b7b54491faa696b8b901d01856ecfa781f159ae7da7a9bf
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://jacksth.ru/wix?keyword=braves+schedule+2020+on+tv PDF link annotation
    • https://mixorone.weebly.com/uploads/1/3/1/4/131438240/zivibuwakebiverulanu.pdfIn PDF document text
    • https://cdn.sqhk.co/tikisudolo/gjWUkhj/zekixokev.pdfIn PDF document text
    • https://sekatuxu.weebly.com/uploads/1/3/4/8/134894727/mixekidofumaris.pdfIn PDF document text
    • https://cdn.sqhk.co/xakelafu/ahggfVA/nekawitofemo.pdfIn PDF document text
    • http://basutuv.iblogger.org/dukamozesizite.pdfIn PDF document text
    • https://cdn.sqhk.co/pajokiman/igjhhe9/planet_fitness_near_me_open_24_hours.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/vobuturinivi/banned_movie_apps_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/kefefetafij/93247009243.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/bidivetigugofitegemus.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/annexure_h_passport_word_format.pdfIn PDF document text
    • https://s3.amazonaws.com/jewizopukuni/instagram_video_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/quadratic_equation_worksheets_gcse.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/bangla_video_song_dev.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/chuyn_file_nh_sang_word_online.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_off0000d6a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6A8 5412 bytes
SHA-256: c7ef41ce785049603ff5c970aebcce2af08cd5af9f1482842635f5adb36189a3
font_01_sfnt_off0000e90b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE90B 9824 bytes
SHA-256: d88f921e1fd0a30845b0df69dfd8dcb3de42fa6b9fd431166ec071af3669f08f