Malicious PDF — malware analysis report

Static analysis result for SHA-256 18cbda11628458c0…

MALICIOUS

PDF

74.4 KB Created: 2021-03-04 08:07:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: adc0695e88a1a4a3e33a414eced1e392 SHA-1: c6b245492588b60a05318907e2a983395cbe36c5 SHA-256: 18cbda11628458c09699e55d0beaed0eedc551b77f8621caa474ab6527c4c007
176 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
  • 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.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://xajibur.ru/wix?keyword=free+robux+codes+not+used PDF link annotation
    • http://bnl-jobs.com/jumujakimogodotifilf17nr.pdfIn PDF document text
    • http://igbusinessabouthelp.com/what_does_the_multiple_intelligence_test_measurebhb46.pdfIn PDF document text
    • http://onlineeshop24.xyz/multicuiseur_philips_hd3037_recetteszxuny.pdfIn PDF document text
    • http://talefipevaxexe.22web.org/how_do_you_change_the_font_size_on_a_brother_p_touch.pdfIn PDF document text
    • http://sosyaltakipcipanelin.com/tesla_model_3_long_range_0-60_after_updateww4x3.pdfIn PDF document text
    • http://osmosiotzs.fun/3217529717rgpxn.pdfIn PDF document text
    • http://unreguezff.rest/583994293803z6g5.pdfIn PDF document text
    • http://loginwithfb.site/brown_rice_vs_white_rice_nutritional_informationsoyo9.pdfIn PDF document text
    • http://inmyshtangen.xyz/tomepumemuburibilewuved1vzx.pdfIn PDF document text
    • http://stassikorskyi.com/61045347544y0nf5.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/befafuni/descargar_libro_aura.pdfIn PDF document text
    • http://fozipifi.epizy.com/seduz.pdfIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/hunger_games_book_3.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/java_spring_annotations.pdfIn PDF document text
    • http://lebevinawefebo.rf.gd/transformers_toy_bumblebee.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/bichagadu_video_songs_telugu.pdfIn PDF document text
    • http://zurorunurem.epizy.com/garmin_forerunner_410_watch_band_replacement.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/biotransformation_innovation_platform_astar.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_off0000e860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE860 4856 bytes
SHA-256: 9fbfddcd6f9f31e7afcb6ef04ed94dd2b77cc4e0c9435a10d3fe1313f2a6c420
font_01_sfnt_off0000f8f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8F3 10460 bytes
SHA-256: 608589faaa8e3ece675986b1bb83c9df09e998a0dd765f45dfb95da141de544f