Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2a3ebc7f1abcbab…

MALICIOUS

PDF

75.0 KB Created: 2021-03-13 14:39:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: c67bd8c13f1add51c03bd5ffedf57717 SHA-1: 42f0aa691bbacc9cf261ed275f10fca4abec40ad SHA-256: a2a3ebc7f1abcbab95456c23f2347719c33cbff7ce7f2fa90b1c4180d23e605a
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, a common tactic for phishing or distributing further malware. While no scripts were directly extracted, the presence of embedded URLs pointing to suspicious domains like jumiwimov.ru and regsen.website strongly suggests the document's purpose is to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jumiwimov.ru/wix?keyword=ninja+ios+app PDF link annotation
    • https://cdn.sqhk.co/fevivesuxofo/S4jjhgg/drag_sports_bike_wallpapers_for_mobile.pdfIn PDF document text
    • https://cdn.sqhk.co/jenotonolo/kHOgdSn/1328010878.pdfIn PDF document text
    • http://regsen.website/metro_name_id_authentication_failed0ui7i.pdfIn PDF document text
    • http://twitter-center.com/84088587828n3p3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499300/normal_60334ff751fa2.pdfIn PDF document text
    • http://idealicaitalia-oficial.site/88502053945qxfi0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365586/normal_602bfc0738e81.pdfIn PDF document text
    • http://tonerinkstore.com/77132725340h7ztp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491451/normal_5fc6afe841846.pdfIn PDF document text
    • http://instapriz.online/how_to_write_an_essay_introduction_hookbqzhd.pdfIn PDF document text
    • http://digtalcaliper09.xyz/mad_school_karachi3y7g3.pdfIn PDF document text
    • http://rubeatyshop.xyz/vuzubojizesefirirobenej6czjn.pdfIn PDF document text
    • http://remont-kvartir-otzyvy.moscow/najojakomuxevivediiytp8.pdfIn PDF document text
    • http://lisolu.org/ferevuguxibuwesuza6ffka.pdfIn PDF document text
    • http://getyourcredit.info/dixie_chopper_blackhawk_reviewd5ooi.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/5A9yYAP/cat_condo_tree_tower_with_hammock_bed_and.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/75f41c2a-a8f7-45bb-a5bc-6eb67874ce37/botojorowowobusekenowano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cf23854-51b7-47ea-9f13-9520964559e7/86758804692.pdfIn PDF document text
    • http://xotaxebotejij.rf.gd/givogulorisemivolu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c016475-fe3e-4ebc-84f3-42b634c92303/surface_area_of_composite_3d_figures_worksheet_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/952dfe8a-eab4-400c-9a80-8e5f51c57bca/63985845709.pdfIn PDF document text
    • http://wujarid.epizy.com/marketing_case_study_template_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca50dec4-06ab-470f-a47e-934c4e6b636f/how_to_fold_up_top_paw_crate.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_off0000eab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB0 4732 bytes
SHA-256: 8fee2d4ca654b3fbe38111bd523cd845fb152d238799e59c27ad6292f558f6af
font_01_sfnt_off0000fae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE1 10668 bytes
SHA-256: 414c7f1b57d38c8a28c45717a1dd06e0847fe415a2e3f8ed01b0e1bef40505b0

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