Malicious PDF — malware analysis report

Static analysis result for SHA-256 97cafd308f208fc4…

MALICIOUS

PDF

75.2 KB Created: 2021-04-21 03:01:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 69a0980b002db262653650ce8c8099b4 SHA-1: 622d10c8cb6f8f87dd585a0a8df86df5b8062f12 SHA-256: 97cafd308f208fc4c4215cb9a4cb8c453797a52ba63a31f90ddd34ce83119827
136 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it's a phishing lure, specifically using an image to redirect users to a malicious URL. The ML classifier and ClamAV detection strongly support its malicious nature. The embedded URL, 'https://seumenha.ru/strik?utm_term=air+force+1+black+low+tops', is the primary indicator of compromise, likely leading to a phishing or malware download page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://seumenha.ru/strik?utm_term=air+force+1+black+low+tops PDF link annotation
    • https://cdn.sqhk.co/koxixoneto/heCheTZ/wokafefibegiwu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366306/normal_60301b6729756.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369174/normal_602726bd87763.pdfIn PDF document text
    • http://okrasote.info/wood_carving_merit_badge_worksheet_answerss2v5h.pdfIn PDF document text
    • https://cdn.sqhk.co/zovaratigu/idgieaN/tepunedevugukidi.pdfIn PDF document text
    • https://cdn.sqhk.co/wakivugex/abq8gg1/endomondo_running_walking.pdfIn PDF document text
    • http://savadaqwe.space/what_is_the_difference_between_a_calzone_and_a_panzerotti5fmxl.pdfIn PDF document text
    • https://cdn.sqhk.co/dosakupu/gjB4M5k/grand_mountain_adventure_snowboard_premiere_full_apk.pdfIn PDF document text
    • http://limebago.iblogger.org/59275708366.pdfIn PDF document text
    • http://bitjoms.xyz/old_school_rap_music_cleanmgcsk.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/joterige/blog_de_libros_gratis_en_espaol.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/infinitive_participle_or_gerund_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/deefd5fb-527d-489e-92b1-0eae64a340ea/15817093887.pdfIn PDF document text
    • https://s3.amazonaws.com/baxunaf/33382121655.pdfIn PDF document text
    • http://juvugevumeki.epizy.com/gedetin.pdfIn PDF document text
    • https://s3.amazonaws.com/lolaritemukole/do_you_put_a_comma_before_inverted_commas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2f467b5-2a42-4ccd-9daa-8c5cf518bcc5/great_lakes_naval_training_center_address.pdfIn PDF document text
    • http://fafovinipola.epizy.com/58207024582.pdfIn PDF document text
    • http://fakomufe.epizy.com/17859820496.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/primo_free_call_app_apk.pdfIn PDF document text
    • http://mipusefifiwud.epizy.com/can_landlord_refuse_to_renew_lease_bc.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_off0000ea54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA54 5344 bytes
SHA-256: 984b6ee77a361c6473686d9f856d387a94ad445c64b6c99fe32c038a02a17070
font_01_sfnt_off0000fcad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCAD 10344 bytes
SHA-256: 1df7b23e731c2057e0eb0f9cf69fa63734eb198bfded9ad13efa22edf4e47c57