Malicious PDF — malware analysis report

Static analysis result for SHA-256 cde97b93539d7502…

MALICIOUS

PDF

78.7 KB Created: 2021-02-07 08:37:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b0d273b29fe36a4f2e67e289e6e44bf1 SHA-1: 2a4791c49d893bfe258a04e85ac09980eca348d1 SHA-256: cde97b93539d7502c3e9f7c7df8d99c0771c3c7c2613bcbbe0c5520b7be41e10
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://crophysi.ru/wb?keyword=smart%20bodyweight%20training%20pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379486/normal_5fe92f37e42bb.pdfIn PDF document text
    • https://kapojisu.weebly.com/uploads/1/3/2/6/132696117/keradebev-bisutuvewejebe-mafejatetuke.pdfIn PDF document text
    • https://cdn.sqhk.co/xejudawadoni/vehhlhb/dokuvewuronadesaxovije.pdfIn PDF document text
    • https://cdn.sqhk.co/dajebala/QpidRCI/monkey_boxing_game_download_apk.pdfIn PDF document text
    • https://zirakamu.weebly.com/uploads/1/3/1/3/131398357/tifapaxos_bijudinakokegin_volutanejas_totonojerudap.pdfIn PDF document text
    • https://cdn.sqhk.co/bokirebi/jchjkgs/fesutedukerir.pdfIn PDF document text
    • https://cdn.sqhk.co/wetotuluxe/XrITHij/enyo_pharma_ipo.pdfIn PDF document text
    • https://pibowalemarume.weebly.com/uploads/1/3/1/1/131164440/vugiwupifev.pdfIn PDF document text
    • https://wuvozova.weebly.com/uploads/1/3/4/5/134500004/bagorulujaxena-jigidopizos-pelexefoxon-wideko.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374207/normal_601b5cbd00968.pdfIn PDF document text
    • https://cdn.sqhk.co/sinemajud/yzLieaC/76824416083.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/sikuva/muzuwibodowikigak.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/zasazapasuninageluvetoguf.pdfIn PDF document text
    • https://s3.amazonaws.com/bomupi/capsim_situational_analysis_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xamibudasagas/caregiver_authorization_form_california.pdfIn PDF document text
    • https://s3.amazonaws.com/pisedij/remove_ads_from_apps_android_root.pdfIn PDF document text
    • https://s3.amazonaws.com/jevedijadiki/budget_template_nz_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/vezumobigodub/45127787751.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_off0000f5ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5EF 5680 bytes
SHA-256: 069a9ec383eca33e918c48bbd1006be549c92fc05d03e48f6075308b491565aa
font_01_sfnt_off0001092f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1092F 10728 bytes
SHA-256: 99042dec34fff1ba5b47cab1354b4f20dda2d7254aad8494ccc245355bdf8dd1

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