Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e4727d88703fd79…

MALICIOUS

PDF

72.0 KB Created: 2021-03-20 08:51:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f2e2619b69c6aa2f4223f7827ae4a49f SHA-1: 7cb274fe1fa854128c9d3f6c3cfb66a6dbc79828 SHA-256: 1e4727d88703fd79a13db2188a3b976c3cca2e42cbc5dff607d3ec489a67ac68
194 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, 'https://crophysi.ru/wix?keyword=nova+legacy+mod+apkpure', which is likely used to lure users into downloading malware or engaging in phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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=nova+legacy+mod+apkpure In PDF document text
    • https://cdn.sqhk.co/kadeposamo/jggeRar/rawobugutig.pdfIn PDF document text
    • https://cdn.sqhk.co/zajujuva/eZbjdbq/super_8_film_overlay.pdfIn PDF document text
    • http://zeruxejobimal.mywebcommunity.org/52753109542.pdfIn PDF document text
    • https://cdn.sqhk.co/wanevakaxuma/nhivdhj/19046545500.pdfIn PDF document text
    • https://cdn.sqhk.co/rogapakaler/jd9ies0/ronemujesetupalipadudeg.pdfIn PDF document text
    • https://cdn.sqhk.co/ferorigife/jfdjfO1/tijujivojinaxu.pdfIn PDF document text
    • https://cdn.sqhk.co/sixitigoxeto/iijijaM/66400436542.pdfIn PDF document text
    • http://lagulesuko.medianewsonline.com/nomowakarudokelatoz.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/3f2fdf51-8f1a-43ee-bc3b-cf8f735eef20/hansel__gretel_witch_hunters_2013_brrip_hindi_dubbed_hd_720p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9186ba66-ee67-4f93-bca4-71369e149944/jesixar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e15c687d-9075-4804-a7c2-cf7dafd7d60b/76418291263.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf675623-edb7-4226-883b-ff74c2bf5238/what_is_commedia_dellarte_characters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8556104-dc5e-4d5f-bb51-dc251a957d7a/is_there_a_camera_inside_the_model_3.pdfIn PDF document text
    • http://teluroluxeterez.myartsonline.com/basics_of_programming.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/new_bhajan_video_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/breitling_aerospace_evo_night_mission_black_dial_titanium.pdfIn PDF document text
    • https://s3.amazonaws.com/xufujofaleki/zexodizewesuzokixovikibam.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/7904632673.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffa38f59-e624-4cb1-89cc-e06837f585a2/what_exercises_work_the_gluteus_minimus.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/fios_remote_not_working_with_samsung_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34c510ca-b9a8-48ef-9fec-feb186016d82/how_to_improve_english_speaking_fluency_in_tamil.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_off0000cc5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC5B 5056 bytes
SHA-256: b6366865ef2d2c3fea9bb88a082d45967ee8b1014a3920dbba97639c698c510b
font_01_sfnt_off0000dda5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA5 11260 bytes
SHA-256: d470d5864cb76c5ee6e8ec78e53be4b056a555ebfcbbd56df2436b48db7a8825
font_02_sfnt_off00010324.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10324 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f