Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f100541d4d7e3c5…

MALICIOUS

PDF

72.5 KB Created: 2021-02-18 20:40:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 51d4e27f30fd66129bf837823a685c7c SHA-1: a13148d4dabfde37b83d2520dbf49a7cd60dd84f SHA-256: 2f100541d4d7e3c5be222717a1a68070736c140260099921c13c042c02617875
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/wix?keyword=calculus+graphical+numerical+algebraic+5th+edition+pdf+answers In PDF document text
    • https://cdn.sqhk.co/sezunofubuzi/0Mvj7sa/building_services_management_ltd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376088/normal_6000bc95c55a5.pdfIn PDF document text
    • http://cookwellbakewell.com/pictures_of_coloring_book_pages2kbk9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428341/normal_5fdf47be22259.pdfIn PDF document text
    • http://realwockyc.info/lagu_jambi_pendayung_patahe7wqd.pdfIn PDF document text
    • http://masterpowerpoint.com/vebavofunawowoneliz3fqws.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolaseja/fPqggOi/comcast_prepaid_internet_customer_service_number.pdfIn PDF document text
    • http://alkim.xyz/simple_man_guitar_sheet_music_freegyhen.pdfIn PDF document text
    • https://cdn.sqhk.co/dosojegomugu/jEpghja/94364764887.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/leteraxewe/prepositions_of_time_exercises_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/29591984627.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/laptop_speaker_sound_booster.pdfIn PDF document text
    • https://s3.amazonaws.com/navoburarovada/4476689479.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/soruguxegajasekidemejen.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/xufafugasabutowetevawi.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/bee_notes.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_off0000cdc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC9 5828 bytes
SHA-256: 2c93ed82d07b6c41770c87407c9637a2c2f9ba16e8f3a0b57be9fd3c3547d236
font_01_sfnt_off0000e17d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE17D 15644 bytes
SHA-256: 2aedf67a64721fde0a25f1d87e2a31b4e30f3e45f5bf61e50d64115ddd421d8f