Malicious PDF — malware analysis report

Static analysis result for SHA-256 db8cfe798cbf1329…

MALICIOUS

PDF

71.9 KB Created: 2020-11-11 11:29:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 9dc87a6695050102d4f67834e986970c SHA-1: a3709fcf13121a0d63d6bdcd893540bfcd308f1b SHA-256: db8cfe798cbf1329d1a2ebef88c59fb2c4818517565f9d6e1c18d9f0e5df3556
254 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
  • 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?keyword=transformers+games+unblocked+at+school In PDF document text
    • https://wubigunes.weebly.com/uploads/1/3/4/5/134507070/3868552.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5f876774b1de2.pdfIn PDF document text
    • https://naxesitigas.weebly.com/uploads/1/3/0/7/130740165/94049d21c8eb.pdfIn PDF document text
    • https://nugekowu.weebly.com/uploads/1/3/4/5/134587082/b2ad5f64c.pdfIn PDF document text
    • https://buliduxefexefux.weebly.com/uploads/1/3/1/6/131636978/bezupedigovov_winubuneterok_zifekovuj_tolataza.pdfIn PDF document text
    • https://jewajufigojoxi.weebly.com/uploads/1/3/1/4/131438211/fasutekudejaxox.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fedufiporara/y_llegaste_tu_sin_bandera_descargar_mp3_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/academic_books_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/balance_score_card_libros.pdfIn PDF document text
    • https://s3.amazonaws.com/nawuvud/ddo_warlock_build_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sabegokek/hotmail_inbox_edd.pdfIn PDF document text
    • https://s3.amazonaws.com/xezonijida/bawakonana.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/binigexa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE24 5424 bytes
SHA-256: 2b76f4eb1577d959f4c327678fb2521d7bb52b33cc5e3b718f52af51f2e436aa
font_01_sfnt_off0000e062.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE062 10516 bytes
SHA-256: a489e41ab05f093b965ca69e9365592018a9fcd4d3050b2ece27e946a219043a
font_02_sfnt_off0001043f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1043F 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230