Malicious PDF — malware analysis report

Static analysis result for SHA-256 77686817c948db9f…

MALICIOUS

PDF

70.3 KB Created: 2021-01-28 04:33:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: dbb624ba00ff9679dc4d0e6921f2dd82 SHA-1: f1ffe651bbdb56f3eefabd6b10f7f4fb47a05357 SHA-256: 77686817c948db9fd2a5d580de4150b226e6bc9b294dd9fa8352264f29b969c7
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://crophysi.ru/aws?utm_term=best+stock+android+phones+october+2019 In PDF document text
    • http://filuniguwol.22web.org/refexugel.pdfIn PDF document text
    • https://gorenusedom.weebly.com/uploads/1/3/5/3/135326887/suralo_tinikeg_xafevijuw_kigafutipaxate.pdfIn PDF document text
    • https://nujetamewude.weebly.com/uploads/1/3/4/8/134881912/2730864.pdfIn PDF document text
    • https://popuvagilubasi.weebly.com/uploads/1/3/4/0/134018524/ladaluzokifutud_sojakoxow_fezubefuzawiwi_girajevojaxaguv.pdfIn PDF document text
    • https://waxosutuj.weebly.com/uploads/1/3/1/4/131437699/ed4f0b8909d5f.pdfIn PDF document text
    • https://wugeneziwepuzi.weebly.com/uploads/1/3/4/4/134494794/8024753.pdfIn PDF document text
    • https://sufusaripowo.weebly.com/uploads/1/3/1/4/131437865/temekalezu-lijukataz-vefojo-damojela.pdfIn PDF document text
    • https://cdn.sqhk.co/fosulavale/eehifjg/44881283492.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/setikizo/77125767437.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/dr_martens_2976_chelsea_boot_platform.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/washington_boaters_course_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/sajezupes.pdfIn PDF document text
    • https://s3.amazonaws.com/gekojulog/anaerobic_fermentation_process.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/8928979492.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/44106928610.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_off0000d304.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD304 5864 bytes
SHA-256: 3afe5379654af9bf198d9e7aabc0b6e5c0ec2a4b4fee80178ccf5ee55414f647
font_01_sfnt_off0000e6f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F3 11036 bytes
SHA-256: 616a94d2825927a6afbcf7cc3dfc5ccbf89ea658f939f86c9552d37c28738739