Malicious PDF — malware analysis report

Static analysis result for SHA-256 d189cd98615fdfbe…

MALICIOUS

PDF

68.3 KB Created: 2020-11-11 12:23:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: d5685e0c91ba6fd8b56b8713c610e338 SHA-1: 5f222ad62cc4adbfe556dd8c246bba9ec31ab309 SHA-256: d189cd98615fdfbeddb499fdc345cce638fd208b84b2a4fea25c69af78395332
196 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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafficel.ru/aws?keyword=cone+worksheets+for+preschool PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4368768/normal_5fa465dfeb55e.pdfIn PDF document text
    • https://wejibuxod.weebly.com/uploads/1/3/0/7/130740202/kekobimosekuwi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375203/normal_5f8aab4ca31dd.pdfIn PDF document text
    • https://virukuzababije.weebly.com/uploads/1/3/4/3/134350100/mezorewe-laloje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445326/normal_5fa7c5b5a3c85.pdfIn PDF document text
    • https://rokumetusemep.weebly.com/uploads/1/3/4/3/134382705/96430a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380382/normal_5f902c9146416.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://uploads.strikinglycdn.com/files/62f958f7-d2d6-458a-b75e-7d4470054907/febudinojulivopotizu.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/42034505475.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/square_root_function_domain_and_range.pdfIn PDF document text
    • https://s3.amazonaws.com/naramuro/congolese_girl_names.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/kokevipor.pdfIn PDF document text
    • https://s3.amazonaws.com/wipotegadodorek/vekikexagexeworemap.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/13909841717.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxepiduded/42892739582.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_off0000c446.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC446 4812 bytes
SHA-256: 566a9adacf7a3c350d77c2981e7d8f4b5af98a7df9d35ef3fb6d42755118425b
font_01_sfnt_off0000d4ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AB 9772 bytes
SHA-256: 8e238bb7977cc706118d22fac11668eafbc40d6474c32537044dd07e8c793ffd
font_02_sfnt_off0000f605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF605 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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