Malicious PDF — malware analysis report

Static analysis result for SHA-256 c715c7aca25d05b4…

MALICIOUS

PDF

81.3 KB Created: 2021-02-17 08:40:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2296980ecc124ce9d95df5edf9224008 SHA-1: b0342b90a7d0c6fe181734628260766cc2b5e2bd SHA-256: c715c7aca25d05b47b1ccdca7639e6cc4fa9532d901585a1ba8328baaebd341e
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a lure related to resetting a remote control, which is a common tactic for phishing or malware distribution. The high-risk heuristic PDF_SEO_UTM_REDIRECTOR_LINK and the ML classifier strongly indicate malicious intent. The embedded URL points to a suspicious domain, likely serving as a redirector to a malicious payload or phishing page.

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
  • 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://jacksth.ru/strik?utm_term=how+to+reset+harbor+breeze+remote+with+dip+switches PDF link annotation
    • http://austritkfa.com/55572407877y27yc.pdfIn PDF document text
    • http://uuuuull.space/safuvekitepokarafuzx3vu.pdfIn PDF document text
    • http://pixxel.life/wimubakifstrah.pdfIn PDF document text
    • http://pristav.pro/60792839338ve4ih.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sijaxulo.rf.gd/xabirekutizodatute.pdfIn PDF document text
    • http://fitatina.rf.gd/shayari_image_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/posaxugidut/kokejidexegetotizekilexur.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/wopozo.pdfIn PDF document text
    • http://rovunebezub.epizy.com/fegawa.pdfIn PDF document text
    • http://vemexomejolu.epizy.com/2156964454.pdfIn PDF document text
    • https://s3.amazonaws.com/ninazarila/sijowo.pdfIn PDF document text
    • http://jefeduwikiw.epizy.com/dekekajojalokifoteraga.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifumofelu/formation_administrateur_systeme_cours_du_soir.pdfIn PDF document text
    • https://s3.amazonaws.com/vebogotexaf/bracket_new_song.pdfIn PDF document text
    • http://lojetewope.epizy.com/cell_cycle_regulation_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/magic_kingdom_guide_map_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/oracle_database_12c_installation_guide_for_linux.pdfIn PDF document text
    • https://s3.amazonaws.com/mekonulegipero/happy_new_year_sambalpuri_song_2019.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_off00010164.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10164 5524 bytes
SHA-256: 2847665aafa5998aded49fdaa7be46fc11b9dadd824739fbbabdd4a420b8761e
font_01_sfnt_off0001140e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1140E 10468 bytes
SHA-256: f0e499e1ed5f7cb6efff09f6a6ea4f0dd949a2a0518c96f0c0a565c36fac89fc

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