Malicious PDF — malware analysis report

Static analysis result for SHA-256 cddfc4e5f47385d3…

MALICIOUS

PDF

70.4 KB Created: 2021-02-26 00:06:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: c4b691c27e2628cadd64f1b7e4c63e45 SHA-1: a319ff58a3f97676434e9eb968c2eee48b64dc8a SHA-256: cddfc4e5f47385d346da89572478e8c7b1e4357c4146602b50a0fdf89be83f84
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://leonvi.ru/award?keyword=how+much+does+a+life+coach+certification+cost PDF link annotation
    • https://cdn.sqhk.co/vijamabaf/e15fjfo/breyers_delights_vanilla_bean_ice_cream.pdfIn PDF document text
    • http://voduvalegef.66ghz.com/mavobap.pdfIn PDF document text
    • https://tosoremekik.weebly.com/uploads/1/3/4/7/134771766/6793204.pdfIn PDF document text
    • https://cdn.sqhk.co/wufaluvete/e0nysUu/29656740548.pdfIn PDF document text
    • https://cdn.sqhk.co/zegofurop/hjrjghf/sukeloguxadapuxekotigu.pdfIn PDF document text
    • http://ximikilanad.22web.org/bls_test_questions_and_answers_2016.pdfIn PDF document text
    • https://cdn.sqhk.co/kugorazig/fvhgTMw/baby_animal_sounds_age.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/zupenafud/47811357963.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/6732527785.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/71112805335.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/retopepibikaked.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/vejisinutar.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/95680726635.pdfIn PDF document text
    • http://wawuzir.epizy.com/69735178560.pdfIn PDF document text
    • https://s3.amazonaws.com/tuletivotarupu/76701068812.pdfIn PDF document text
    • https://s3.amazonaws.com/sojaxub/30140808806.pdfIn PDF document text
    • http://vamudeb.epizy.com/hearsay_exceptions_cheat_sheet_federal.pdfIn PDF document text
    • https://s3.amazonaws.com/bidivo/33584452615.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_off0000d84c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD84C 5316 bytes
SHA-256: 997d4a200da0189a362fc364845654ba3b82b3f9806a153abd4e1ffeb4d2fd37
font_01_sfnt_off0000ea41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA41 9936 bytes
SHA-256: c237100b6498598d244616234dd8d84016e09d3019a027e2d00afd73a091ac70

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