Malicious PDF — malware analysis report

Static analysis result for SHA-256 def1c8151fcb35ff…

MALICIOUS

PDF

76.8 KB Created: 2021-02-17 19:16:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: bc1d616193d59a3a2dde9e1df96cb3d7 SHA-1: 05012b7b8b245e8f9b24558d76fb1a6e4557ff87 SHA-256: def1c8151fcb35ffa289ab4ebf790db80d1d6d4eaaf1b9fe845bbdc273b93052
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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/wix?keyword=clicker+klik1u+manual In PDF document text
    • https://cdn.sqhk.co/livukigelo/ZIhgjM4/gukem.pdfIn PDF document text
    • http://xafegadixugu.iblogger.org/auditing_for_dummies.pdfIn PDF document text
    • http://fakaremun.iblogger.org/vanineruxepozuvafikix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jovofixelojepod.epizy.com/76938601866.pdfIn PDF document text
    • http://vejesigivilowen.rf.gd/tasikerag.pdfIn PDF document text
    • http://sinivexoxal.epizy.com/22732684077.pdfIn PDF document text
    • https://s3.amazonaws.com/lupebesu/lagilasowupojavefiw.pdfIn PDF document text
    • https://s3.amazonaws.com/lopeteb/icare_workers_insurance_piawe_form.pdfIn PDF document text
    • http://ruxuvejefo.epizy.com/97998792035.pdfIn PDF document text
    • http://bijalefopate.rf.gd/titulos_de_credito_unam.pdfIn PDF document text
    • http://fixiwerasame.rf.gd/aurecon_bridge_building_competition_guidelines_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/kiremefegonar/werezuranazovewezir.pdfIn PDF document text
    • http://pexevogawi.epizy.com/best_spy_video_recorder_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/how_to_draw_a_dog_step_by_step_for_beginners.pdfIn PDF document text
    • http://purevaxa.epizy.com/kadhal_kadhai_tamil_movie_hd.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_off0000ec8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC8C 4788 bytes
SHA-256: e7a4c4af3802740f4b0ca793045cad89c7b1a8624a41de8f5de62601b20273bf
font_01_sfnt_off0000fcc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCC0 12896 bytes
SHA-256: aef498aeeb7c7fb17b5d1e6193fd96fa595692d85c74e1e6921cd1217468c582