Malicious PDF — malware analysis report

Static analysis result for SHA-256 f350bdbf3fa58ba0…

MALICIOUS

PDF

75.1 KB Created: 2020-12-21 15:58:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 30b1c613b5056640882c2ae1a1592c33 SHA-1: 0d9f39b217eca1b4c9360850f6c72d2bf8ba1b92 SHA-256: f350bdbf3fa58ba05a05182c4de03f3274309fc2ba023c9f9c3e158738342ffc
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://ggtraff.ru/wb?keyword=gutschein%20amazon%20prime%20einlosen In PDF document text
    • https://benipotuwazel.weebly.com/uploads/1/3/4/4/134445242/9510253.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393035/normal_5fe02c369261d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412775/normal_5f94ad75d3fd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476446/normal_5fdb14b4a6490.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/01397776-6250-47b1-af5d-9e519f6eefaf/bugaduzeloripib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a2dec7c-db1b-4648-9460-a65a50a93aaa/xisavowesamo.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/92795649506.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef762ca1-478a-4233-abfd-ea1f471871f5/wataxidute.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/can_i_view_icloud_photos_on_android.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/online_movies_sites_for_bollywood.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/ccna_voice_certification_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fosalizuzu/kizepilirim.pdfIn PDF document text
    • https://s3.amazonaws.com/kewakuko/beach_buggy_racing_apk_mod_unlimited_money.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75439519-0ab3-424e-ae26-2639ecc1becb/telezolemodekokakeniz.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/acrylic_painting_for_dummies_free_download.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_off0000e7cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CD 5252 bytes
SHA-256: f32b4fec696bcea285398d75cdaabaaa3717ad0e41547ac0fc53eef6b0aa524e
font_01_sfnt_off0000f98c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF98C 11744 bytes
SHA-256: 125187d125fba34d20bce853803c4cb0aa0990ea132909c720499ffc26cd1e75

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