Malicious PDF — malware analysis report

Static analysis result for SHA-256 79275b50940cb92a…

MALICIOUS

PDF

68.2 KB Created: 2021-03-01 03:15:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 51adbbbd0c9ba028786156f7bd85fd79 SHA-1: 745fef8be6abeb6c02cd03a0200a9296e36b153c SHA-256: 79275b50940cb92aa92707b2fafdd55fc4883e45b1d0bcda07ea77b3d8d2c2d1
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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.
  • 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=ic+compiler+user+guide+pdf In PDF document text
    • https://nonizevotete.weebly.com/uploads/1/3/1/3/131384281/tafipubunedob.pdfIn PDF document text
    • http://sawalaxal.66ghz.com/ashes_cricket_game_free_2017.pdfIn PDF document text
    • http://simenomevaxi.iblogger.org/what_is_counting_by_7s_about.pdfIn PDF document text
    • https://radisowe.weebly.com/uploads/1/3/4/3/134366404/segibaren.pdfIn PDF document text
    • https://basitonivi.weebly.com/uploads/1/3/4/5/134584834/fibexuzexivub_puxuvi.pdfIn PDF document text
    • https://jevomijaled.weebly.com/uploads/1/3/1/8/131856338/85ae09.pdfIn PDF document text
    • http://nibumuxadata.66ghz.com/greys_anatomy_spoilers_guide.pdfIn PDF document text
    • http://housefashion.ru/above_all_gospel_song_free21ghf.pdfIn PDF document text
    • http://wrinklestiltskin.com/risujilurewavezw0vf.pdfIn PDF document text
    • http://jobware.pro/poker_face_sheet_music_freesvu9y.pdfIn PDF document text
    • http://vulefuxudonad.22web.org/igi_shooting_game_for_pc.pdfIn PDF document text
    • http://com-signto6.xyz/replacement_parts_for_a_rug_doctorspu3n.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/bivanud/coral_banded_shrimp_care_sheet.pdfIn PDF document text
    • http://wefexafunedex.epizy.com/vuruwimijuwo.pdfIn PDF document text
    • https://s3.amazonaws.com/kotodur/groundwater_and_surface_water_interactions_lab_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/31667642456.pdfIn PDF document text
    • https://s3.amazonaws.com/lunojol/what_is_the_moral_lesson_of_the_gingerbread_man.pdfIn PDF document text
    • https://s3.amazonaws.com/ronenitevodo/48760854199.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/12852981986.pdfIn PDF document text
    • http://tumewadeb.epizy.com/free_jazz_violin_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/bhojpuri_movie_raja_babu_full_movie.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_off0000cf39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF39 5200 bytes
SHA-256: 7f59f66fe1ab2763795ed7d9a7bfa65362c238d11646ba5521d8afc9858cb473
font_01_sfnt_off0000e0d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D7 10140 bytes
SHA-256: 02a724eae1c418de993a259df238f656daaae3e46b5a7299a4d02da16f5713e9