Malicious PDF — malware analysis report

Static analysis result for SHA-256 f390e508f5f13500…

MALICIOUS

PDF

71.5 KB Created: 2021-02-27 03:02:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: d7944875e8638f059c17c80c331450a6 SHA-1: 94557afc505522067ecab92ebb1f5681cc7967e5 SHA-256: f390e508f5f13500495a6329c050a0a50064d53b0d47fab21c80cfc8b5ed05f0
196 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
  • 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://botokaw.ru/award?keyword=how+to+connect+a+brother+printer+that+is+offline PDF link annotation
    • https://titoboxe.weebly.com/uploads/1/3/0/8/130874676/ea9968d.pdfIn PDF document text
    • https://jematujevuzonip.weebly.com/uploads/1/3/4/2/134235480/bc9b269eaa.pdfIn PDF document text
    • https://lajisoxe.weebly.com/uploads/1/3/4/4/134435468/bolakefonago_dulatur.pdfIn PDF document text
    • https://kimimidinom.weebly.com/uploads/1/3/1/4/131453749/mivokatikomimij.pdfIn PDF document text
    • https://nunajamedagafep.weebly.com/uploads/1/3/5/3/135325778/gamukefibevifa.pdfIn PDF document text
    • https://likerediweraj.weebly.com/uploads/1/3/4/6/134691167/9074417.pdfIn PDF document text
    • http://sabovibin.medianewsonline.com/33029044457.pdfIn PDF document text
    • http://nabavawuzafurur.mygamesonline.org/paronamekij.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/vavale/what_is_the_largest_cubic_foot_french_door_refrigerator.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/community_service_log_sheet_word_document.pdfIn PDF document text
    • http://pikubub.onlinewebshop.net/zedopopifex.pdfIn PDF document text
    • https://s3.amazonaws.com/bokexizometun/pusutab.pdfIn PDF document text
    • https://s3.amazonaws.com/piwanisaj/how_much_memory_for_fl_studio.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/casio_g_shock_5302_manuale.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_off0000dcc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC8 5296 bytes
SHA-256: 9a849475b02d9316f929fa19afa61d95d8c593859db385c12732bc5c8a216cab
font_01_sfnt_off0000eed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED5 9976 bytes
SHA-256: 7f727b7c7333de484e77c12e1c1167eeaf43b1043b246a0594069cd43141b4e1