Malicious PDF — malware analysis report

Static analysis result for SHA-256 623fd1cf47804704…

MALICIOUS

PDF

52.7 KB Created: 2020-11-04 03:40:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 2fb1d8f9434f4dc0d98d9048871630e1 SHA-1: 2057369d7ebc207683b831d033341ec6780424b2 SHA-256: 623fd1cf478047043ebc425ce9c5613b65fb0e5dd051e04aa2de5ef9f4c01631
142 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://ttraff.me/123?keyword=tv+satelital+gratis In PDF document text
    • https://mobonojijokatu.weebly.com/uploads/1/3/4/3/134320628/785610.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406464/normal_5f99780384d08.pdfIn PDF document text
    • https://siwizapetodid.weebly.com/uploads/1/3/4/0/134041585/xabapituvazeti.pdfIn PDF document text
    • https://jurarolo.weebly.com/uploads/1/3/4/3/134351512/gusolugagawusib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414852/normal_5f94be54ac229.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380681/normal_5f9451d7da4dd.pdfIn PDF document text
    • https://tipefejiri.weebly.com/uploads/1/3/0/9/130969755/litozugaxuga.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/juvetaso/phase_difference_pspice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d175ddf-3eb6-419f-a4e0-6845eed4a91a/zawidatorabaso.pdfIn PDF document text
    • https://s3.amazonaws.com/xebuvuwov/house_altar_depicting_akhenaten_nefertiti_and_three_of_their_daughters.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/16313464582.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a8d1dc2-fb36-4c5d-9e56-4e4b8ba68a21/bonesorigupunib.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_off000091ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91BA 4864 bytes
SHA-256: 6111d4453b2065dd5015d87788ea967172d93b0c84cd065d76c9fcf69889a86c
font_01_sfnt_off0000a258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA258 10652 bytes
SHA-256: e193d0ca26ec18b55954f2cb1e6f30fa330034e8a7ec3368b89df8de25b647a2