Malicious PDF — malware analysis report

Static analysis result for SHA-256 d48615f9ad23293c…

MALICIOUS

PDF

81.4 KB Created: 2021-02-05 08:12:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: dfa27705b58fc05e847ecd183c2cd07d SHA-1: 688b6c95f242631f32df70127229132f18899d93 SHA-256: d48615f9ad23293c7023c358497e54cc2d82dd9dbca5390b4f8f9b625ed736b5
202 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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/aws?utm_term=charade+informal+synonym In PDF document text
    • http://lg-copyrightforms.com/dominos_nutrition_info64ni3.pdfIn PDF document text
    • http://magic-world.site/xesabewebemidkj0.pdfIn PDF document text
    • http://lalashoppen.online/51970136569p7dwr.pdfIn PDF document text
    • http://roskycnmx.com/64321669008e6hxa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384472/normal_5fe95508a647f.pdfIn PDF document text
    • http://hookup157.site/legasorawk22v7.pdfIn PDF document text
    • http://dombitarf.ru/think_social_psychology_2012_editionc1sp9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469135/normal_600ce3d7e1bf6.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/tobojelusiwi/93642652956.pdfIn PDF document text
    • https://s3.amazonaws.com/xufaxoferugod/analog_and_digital_system.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/90492393219.pdfIn PDF document text
    • https://s3.amazonaws.com/pujinit/runanovezivubori.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/alphabet_animals_flash_cards.pdfIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/22643794589.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/gitekovelejelimug.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_off0000ff56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF56 5156 bytes
SHA-256: b81d3bac493b138803eaf9aa5c2c91585a73c8c09b1de339128003b7b39e6394
font_01_sfnt_off000110b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110B8 12056 bytes
SHA-256: 93a774cb05ad1ed42db44bd71bfe9254c7d35417996cae7d317309fecbc069b7