Malicious PDF — malware analysis report

Static analysis result for SHA-256 9af21fefa7fdae75…

MALICIOUS

PDF

67.1 KB Created: 2021-02-26 12:18:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 998dbf5bb679885061f9e1e24f2f1243 SHA-1: 2ae6d104126094395fcb8941f939b5d818427dac SHA-256: 9af21fefa7fdae7580507f2054c006529824f3734db5b814c3f614dc410eea3b
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://baarspo.ru/award?keyword=how+to+remove+the+dyson+battery PDF link annotation
    • http://antinomi.design/basketball_time_rulesepuyj.pdfIn PDF document text
    • http://toguvuveleguna.22web.org/88937567550.pdfIn PDF document text
    • http://re-capital.ru/2478297717ln2bb.pdfIn PDF document text
    • http://instup.xyz/6672533409718as.pdfIn PDF document text
    • http://zelopaqq.xyz/first_aid_2019_downloadgmul7.pdfIn PDF document text
    • https://zuvaxufar.weebly.com/uploads/1/3/5/9/135993026/7dea4.pdfIn PDF document text
    • https://koxizekeb.weebly.com/uploads/1/3/4/7/134770308/bisozo.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/zufaxepixiguxax/congruent_triangles_worksheet_b.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/python_para_anlise_de_dados.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/rabokikatewebevosi.pdfIn PDF document text
    • https://s3.amazonaws.com/dusubonifu/pusezegapakosa.pdfIn PDF document text
    • https://s3.amazonaws.com/dotivaf/tafedowozupunumar.pdfIn PDF document text
    • https://s3.amazonaws.com/novipaliwid/peptides_and_proteins_lab_report.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/artificial_insemination_in_cattle.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_off0000caac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAAC 5388 bytes
SHA-256: d0627b4cf4f15abdd16b12e6ca33429abfcc6bc825d418fbfdcae51d63f6ea0a
font_01_sfnt_off0000dce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE4 10284 bytes
SHA-256: be37916f296d7ffc6f206ad326e2ce85432b1838062b9828b34857a10fe5197d