Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f561ab5b81e0541…

MALICIOUS

PDF

70.3 KB Created: 2020-11-18 06:07:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 17ac4423f9c53d95f93af01d89b52f66 SHA-1: c104fbe942934d5a7005420ff6fdcd83ac1bcb67 SHA-256: 9f561ab5b81e0541609673e7fe1e2d65a8c34289cbaa503ab3e012d9efcde256
254 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.
  • 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://traffine.ru/123?utm_term=social+policy+statement+meaning In PDF document text
    • https://cdn-cms.f-static.net/uploads/4421200/normal_5f9dffc0c04d6.pdfIn PDF document text
    • https://pexazunawilaga.weebly.com/uploads/1/3/4/2/134265520/8263a27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376380/normal_5f9a34007eff4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kopisigapub/gulch_io_cheats.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f2a5012-109a-4994-9e7a-6c91df58f00b/modele_de_lettre_administrative_en_f.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5513d1ff-b78a-488d-a484-37ce703e603b/52306136723.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f834f20c-84fc-4b94-a2de-5dfac499bc43/xasaxavuzapolofofuvewuwil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb6a1609-81a5-4073-8bc8-9e18cdc8115a/34964010047.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8561753-e679-40a0-a74b-8f2d6ada3fff/3679443396.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/314711c4-69f3-457e-a11b-23d79200d9fc/wilco_learning_how_to_die.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8029d766-40fd-40c4-b87a-ade01ea15116/gaboledaxegerawa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eed3928b-4d48-439d-95db-24ebe52a0ff8/77574950796.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d27bbc21-d5ed-43b8-8ee5-ea5d3446aec8/45928282118.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85b9425c-09b4-4f8c-80f0-cc1c0e449cee/work_power_and_energy_worksheet.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB0C 5152 bytes
SHA-256: f2b79aadf55ce04f645441003b0b7c5fa928cf2f3df3ea4218e0fc7440a8b1cb
font_01_sfnt_off0000dc73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC73 10020 bytes
SHA-256: 2333dd348bf9852589fc18741fb1c9f9b680b1f01af7759c155d244f6fd0f376
font_02_sfnt_off0000fe93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE93 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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