Malicious PDF — malware analysis report

Static analysis result for SHA-256 988d27ddd392d9bf…

MALICIOUS

PDF

73.2 KB Created: 2021-01-22 08:22:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: d38f7260204f51bc7f0f3f921ff233fb SHA-1: de3e52dab6c59dfbfbe1279393037719dfe6f2e7 SHA-256: 988d27ddd392d9bf0302c1c339348f541965a1cafcded875093ab63282f7f880
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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/wb?keyword=second%20hand%20clothing%20online%20nz In PDF document text
    • https://static.s123-cdn-static.com/uploads/4368978/normal_6007a2cb99c28.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427105/normal_5ffbc71770f5b.pdfIn PDF document text
    • https://cdn.sqhk.co/loxowopiv/haTLhak/24271696913.pdfIn PDF document text
    • https://cdn.sqhk.co/fularulojoze/idhfhRe/55494179460.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462678/normal_60082a0d82f8e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495841/normal_5febcfed1b247.pdfIn PDF document text
    • https://site-1179300.mozfiles.com/files/1179300/imdb_blade_runner_parents_guide.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460982/normal_600a4fdfc32de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381748/normal_5fccdeeeccc7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379369/normal_5fe92e3c60a05.pdfIn PDF document text
    • https://cdn.sqhk.co/farafakilof/jfWEdmE/international_business_jobs_salary.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485153/normal_5fd67ef31ca50.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406228/normal_5fff687a08f28.pdfIn PDF document text
    • https://cdn.sqhk.co/malevevipali/aUibgjH/ruropejoziputoka.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/ritoma/60843673674.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_off0000deaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAF 5080 bytes
SHA-256: a1cbe9e16a14056ebcafe553651073a53649576d3c9b160c7b6c3176cbddb452
font_01_sfnt_off0000effa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFFA 11860 bytes
SHA-256: d083bf578927145146ec5b30c907d99314830f2c8364e00fecf26598d291bf9f