Malicious PDF — malware analysis report

Static analysis result for SHA-256 66f6c0269f368e08…

MALICIOUS

PDF

57.6 KB Created: 2020-11-22 01:31:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: ca4dcea85647d1264c74a202feac5939 SHA-1: c32f8b525cceb6d82ae40c97e2eb4ec38db40f76 SHA-256: 66f6c0269f368e08e43120c6c6780dab6a57408d391da99a11a272048670ecba
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffking.ru/123?utm_term=pressure+transducer+symbols In PDF document text
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/wulipozok-fosaxizil-fexubetomuxuwo.pdfIn PDF document text
    • https://fudukonuxevefez.weebly.com/uploads/1/3/4/6/134606022/9933969.pdfIn PDF document text
    • https://kogepojuk.weebly.com/uploads/1/3/4/4/134494897/gefapok.pdfIn PDF document text
    • https://jaxumemiri.weebly.com/uploads/1/3/4/4/134465633/11187f44292.pdfIn PDF document text
    • https://kufojomarolov.weebly.com/uploads/1/3/4/4/134401526/9326855.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac44391b-348b-443a-b81f-9f56fd939a2c/2019-20_school_calendar_dallas_isd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4adb7ad-a850-47b4-b0e1-b57ad4355dbd/suxanikizonuzedebo.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/fusionner_fichier_adobe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/374a4c6e-fc94-473f-96ee-586b2227e4ea/construction_management_4th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08e286b1-a82b-49f3-9397-8b2ef9775102/keduguxasamajarij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68c769e4-572c-4c70-93d5-4c6ecbc700ee/native_american_barbie_worth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a9c183d-bfad-430a-a78c-fc45a9b4c333/gamerukozikutazi.pdfIn PDF document text
    • https://s3.amazonaws.com/tetazino/search_only_fors_google.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f4b8517-543c-4f87-8b8a-fe1e559d971b/pride_of_iowa_butter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d947ede3-1a92-4a04-a780-bf7e0798038b/cs_16_ecc_indir.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_off0000aa3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA3E 5328 bytes
SHA-256: 5856cd443b8e17d9988320dc59a2d7d116bcdd1d885529c2bb3a25d1df5f0de8
font_01_sfnt_off0000bc48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC48 8600 bytes
SHA-256: 93ea02b8eb823f6ef734faf761aa1207ebdbcec7c43c7d4f6d01badd66ade422