Malicious PDF — malware analysis report

Static analysis result for SHA-256 789f21004052c69b…

MALICIOUS

PDF

81.0 KB Created: 2021-02-11 14:40:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ecee2489ea4ba6de6180db646307f99c SHA-1: 98f7a00552ea398b9ca17292f9425f0bfa695539 SHA-256: 789f21004052c69bb63008e37fd6941f93bc353c3de5e6d079198935307b3b4d
254 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
  • 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/123?utm_term=cast+iron+smoker+box+recipes In PDF document text
    • https://nudezodubazez.weebly.com/uploads/1/3/1/1/131164524/degidubefopito-xozuxa-padoxasapex-vofuvaro.pdfIn PDF document text
    • https://wumefabifu.weebly.com/uploads/1/3/4/8/134888429/zokalipajoga-miwexed.pdfIn PDF document text
    • https://cdn.sqhk.co/roratumopiv/ghhb7gi/line_rider_music_game.pdfIn PDF document text
    • https://morutasatosode.weebly.com/uploads/1/3/4/3/134366393/godidufokudug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dexedigobejo.rf.gd/ascending_aortic_aneurysm_guidelines_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/fareranives.pdfIn PDF document text
    • http://vuremekewema.rf.gd/jejuvanolapifixizawiru.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/bible_commentary_books.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/baby_song_tamil_video_song.pdfIn PDF document text
    • http://wobudesupak.epizy.com/ganesh_aarti_songs_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/annadata_bengali_full_movie_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/tinker_island_tangle_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/kamonixulemidewedubile.pdfIn PDF document text
    • https://s3.amazonaws.com/waduzirader/retifivemajapus.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/sazavokopid.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_off0000fe6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE6B 5224 bytes
SHA-256: 0b09a1f7f98c7b50b6ed08bd842a54d2f417f5ff49abf31159d71b538c8a3934
font_01_sfnt_off00011016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11016 11620 bytes
SHA-256: 7059f754e83fc566483a2b6e0f44add195042dc325b638d201c6e695be8c8c0d