Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b5440de4742ba94…

MALICIOUS

PDF

70.4 KB Created: 2021-02-12 03:22:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 81935bbc8d23e0ad644f279c1d9303e9 SHA-1: 7c086a7ec710d4af305d8c109a5aface672a7807 SHA-256: 8b5440de4742ba94b54b82456384bf6d6c34ab560559f8cde0afe6c83388e818
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://yafferge.ru/wix?keyword=average+velocity+and+acceleration+worksheet In PDF document text
    • https://xikematevi.weebly.com/uploads/1/3/4/3/134392378/masafudirabobe.pdfIn PDF document text
    • https://nisaxiguxizi.weebly.com/uploads/1/3/5/3/135306566/1535064.pdfIn PDF document text
    • https://rerararomimin.weebly.com/uploads/1/3/1/3/131383042/6348958.pdfIn PDF document text
    • https://lelopotive.weebly.com/uploads/1/3/0/7/130738546/gaxorogamu.pdfIn PDF document text
    • https://mimasalidapu.weebly.com/uploads/1/3/4/4/134466186/maputazi_tuvowifobajovid_lokix_wimomibekovubov.pdfIn PDF document text
    • http://nolesed.22web.org/amiga_kickstart_rom_files.pdfIn PDF document text
    • https://mogopefisumiba.weebly.com/uploads/1/3/5/2/135295831/26835d9184.pdfIn PDF document text
    • https://valojeruxul.weebly.com/uploads/1/3/4/6/134681631/betukikifi.pdfIn PDF document text
    • https://susafoxepi.weebly.com/uploads/1/3/0/7/130775374/1300855.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/jeromisixinolib/68146463689.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/56855515811.pdfIn PDF document text
    • https://s3.amazonaws.com/juliziwojatige/76230655123.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/borat_movie_online.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/zibenufewirel.pdfIn PDF document text
    • https://s3.amazonaws.com/sixolose/hadoop_the_definitive_guide_by_tom_white.pdfIn PDF document text
    • http://fobifuv.epizy.com/writing_task_1_sample_answers.pdfIn PDF document text
    • http://zunakaduwuba.rf.gd/vcds_lite_crack_free.pdfIn PDF document text
    • http://rodobokojezaga.epizy.com/atlassian_confluence_templates.pdfIn PDF document text
    • http://labazesunug.epizy.com/wixibozoxazizikudo.pdfIn PDF document text
    • https://s3.amazonaws.com/tifuwuw/bodybuilding_diet_plan_for_male_beginners.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/luzudezutiluxofawifide.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_off0000d72f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD72F 5508 bytes
SHA-256: 5cfb2b0124f2aa114c1c1fecfca8b1dd96b74907185ab057f0ec585fce666c91
font_01_sfnt_off0000e9ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9FF 9972 bytes
SHA-256: 97eed0aea32f31ffc90e422d5eba4ef74c2685198030cab1975042c547c2c46c

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