Malicious PDF — malware analysis report

Static analysis result for SHA-256 64c863eab0827f00…

MALICIOUS

PDF

71.6 KB Created: 2021-02-22 06:46:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 11069258174f80715e4533a091282a99 SHA-1: 1e0d3d1ce3bbfc60083dc55bf13ac62a9da1d394 SHA-256: 64c863eab0827f00746cc71dd3ed333ea0b936621222e1ac829d0dbe8c7e1345
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://yafferge.ru/wix?keyword=charlie+brown+thanksgiving+free+printables In PDF document text
    • https://cdn-cms.f-static.net/uploads/4451028/normal_601a53f6585a7.pdfIn PDF document text
    • https://sewenafefu.weebly.com/uploads/1/3/4/0/134012434/nupawizuwiwe.pdfIn PDF document text
    • https://cdn.sqhk.co/zudoputasafe/dTibsrG/kewipezilopavigew.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403428/normal_5ffbbb077dd04.pdfIn PDF document text
    • http://pestore.pro/491244117274r9w.pdfIn PDF document text
    • https://cdn.sqhk.co/joxutedunik/jajj3hc/56057533065.pdfIn PDF document text
    • https://cdn.sqhk.co/korulifesewa/hnieifZ/37684796737.pdfIn PDF document text
    • http://harkateine.fun/cequent_performance_parts4osnu.pdfIn PDF document text
    • http://erogan24.website/libros_cristianos_para_mujeres_gratisfkj7s.pdfIn PDF document text
    • https://duxojavuse.weebly.com/uploads/1/3/1/4/131483254/6407519.pdfIn PDF document text
    • http://stixlife.info/911244670402ckky.pdfIn PDF document text
    • https://rasisepuwefu.weebly.com/uploads/1/3/4/6/134678142/lopen.pdfIn PDF document text
    • https://cdn.sqhk.co/xakalodesi/vghu4th/ultimate_dinosaur_simulator_apk_hack.pdfIn PDF document text
    • http://websporizle3.com/dumureanntx.pdfIn PDF document text
    • http://hookup157.site/784361793968nimf.pdfIn PDF document text
    • http://govnososal.xyz/audio_trimmer_macrkmgt.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/norozovijalu/21697641003.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/ranukodejekabe.pdfIn PDF document text
    • https://s3.amazonaws.com/tetenifeme/91023051137.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/zejefodezakosifozulox.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/tugijas.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_off0000da87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA87 5424 bytes
SHA-256: deccc013db5d56b66c4b6e646512831350017d611dd86b194e237b6e6b06d816
font_01_sfnt_off0000ed05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED05 10448 bytes
SHA-256: 9a805bf94c3229208966ea452412b0b989833a3e459eac8187ac3213195fa85f