Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e4781594cefd9ac…

MALICIOUS

PDF

72.7 KB Created: 2021-03-01 00:35:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 218235f71f13904a37f08c29f6488fcb SHA-1: fffde0b2b0b8f082f494d8cc524e3404c0ccb6bc SHA-256: 8e4781594cefd9acdbe3f8205dd30dcd3619ecd5db5b42b01291495fb59eef98
196 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
  • 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.
  • 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://maypoin.ru/award?keyword=frigidaire+ultra+quiet+1+parts PDF link annotation
    • https://cdn.sqhk.co/purilusevike/MgiYgdp/lenitodefi.pdfIn PDF document text
    • https://cdn.sqhk.co/molavagew/hb9dzig/vubefe.pdfIn PDF document text
    • http://xafopawiki.medianewsonline.com/kujagid.pdfIn PDF document text
    • http://canonsburglake.org/62651234802gd20z.pdfIn PDF document text
    • http://riwotivadejud.sportsontheweb.net/fuduvatexedanuvaxuwu.pdfIn PDF document text
    • https://cdn.sqhk.co/mozopojugode/gSfhegh/business_days_calendar_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/rifibimilo/bjdggJ6/how_to_play_my_little_pony_ar_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/zavilisuga/tFfjegh/tiles_hop_game_music.pdfIn PDF document text
    • https://tidemipevu.weebly.com/uploads/1/3/0/7/130740592/c7643326.pdfIn PDF document text
    • http://fruittea.space/bowflex_pr3000_user_manualc61wp.pdfIn PDF document text
    • https://pugotaba.weebly.com/uploads/1/3/5/3/135302821/marusa.pdfIn PDF document text
    • http://kogemotuju.getenjoyment.net/31834602745.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/kudufigunabi/60344649650.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/yaseen_shareef_telugu.pdfIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/nexifiranozufejokex.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/10458751163.pdfIn PDF document text
    • http://nowimirozox.atwebpages.com/lijegi.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/42044139510.pdfIn PDF document text
    • http://pulutugorivexek.atwebpages.com/mvcc_financial_aid_email.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_off0000e03c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE03C 5260 bytes
SHA-256: 73894b1472333a2339a349b5c93956f1bde9596082ec41158cf67d00e1be4f03
font_01_sfnt_off0000f22f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF22F 10420 bytes
SHA-256: 4b3bad78f322df20b374d79de3ac51eee9b5de8d500fd5d6ac33a55a2993ae88