Malicious PDF — malware analysis report

Static analysis result for SHA-256 a57a29060161e7c7…

MALICIOUS

PDF

70.4 KB Created: 2021-01-28 01:10:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 5bd7933751a7e5b62cfa17cca04e3212 SHA-1: 8e7ca14eef3ca94aaf0bd32569c5e11dd77cddc7 SHA-256: a57a29060161e7c7854b269665e07bf51f4462ee419542f3772ae5b9230808f5
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://yafferge.ru/infin?keyword=behold+our+god+song In PDF document text
    • https://cdn.sqhk.co/berirenike/jgehcgc/blank_tree_template_with_roots.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410448/normal_5fd1879b3dd3f.pdfIn PDF document text
    • https://cdn.sqhk.co/fusunusol/fO2jcia/top_football_manager_2020_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/vonezositixi/aqjg7jf/space_crew_best_weapons.pdfIn PDF document text
    • https://cdn.sqhk.co/japewaturu/ftjiarz/3082455961.pdfIn PDF document text
    • https://cdn.sqhk.co/vozaxodep/icjdsAH/55322569352.pdfIn PDF document text
    • https://cdn.sqhk.co/pufowuvikij/Vmc7bkp/zimatujepevidik.pdfIn PDF document text
    • https://cdn.sqhk.co/lewivapawo/YNgcgj3/contact_lenses_online_nz.pdfIn PDF document text
    • https://cdn.sqhk.co/segenapiza/5e5L1cM/xojuwegevetotaxidemopo.pdfIn PDF document text
    • https://cdn.sqhk.co/temejikowewa/dhehi8U/ordinary_people_lyrics_blake_rose.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374857/normal_6009fb443b09d.pdfIn PDF document text
    • https://cdn.sqhk.co/jagapifa/EgijhjL/54989659497.pdfIn PDF document text
    • https://cdn.sqhk.co/fipimomozuk/IgitMjf/picture_lock_screen_full_screen.pdfIn PDF document text
    • https://cdn.sqhk.co/gabazumad/hhhdhfB/21442225120.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/kovilowab/apkpure_football_games.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/35213274085.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/teamviewer_10_free_filehippo.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_off0000d85e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD85E 4928 bytes
SHA-256: eead65b64589031452821a4b44174a35017a356f3c35d0ccb39e1fe9fd5d8d15
font_01_sfnt_off0000e91e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91E 10472 bytes
SHA-256: 438181667040ddd9f3cf539aae08147f4d6ef0b492cdcc2b3eab084820c6fbb8