Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cec80761915373b…

MALICIOUS

PDF

80.2 KB Created: 2021-03-03 18:08:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 4ffb91e06ab7304cd2cfe79b29e071a0 SHA-1: 7e8a484e6cff31d5e15f95cd35225861a2f05511 SHA-256: 0cec80761915373b5a69ce302c29d410095bd953e4667f7f252dae62f8200bb1
184 Risk Score

Malware Insights

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

The PDF contains embedded links designed to redirect users to malicious infrastructure, specifically identified by the heuristic PDF_MALICIOUS_REDIRECTOR_LINK. The document body, though garbled, appears to be a lure related to product comparisons, suggesting a phishing or scam attempt. The presence of numerous links on disposable hosting further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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.
  • 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://yafferge.ru/strik?utm_term=whats+the+difference+between+roomba+670+and+675 In PDF document text
    • http://copyrightshelpscenters.com/nunuvotinuxevirixivezikio7ony.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413238/normal_60198ec9bc2e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424328/normal_6024cdd52bb38.pdfIn PDF document text
    • http://ceter.xyz/as_bill_sees_it_daily_readingjgcqx.pdfIn PDF document text
    • http://polobasopika.mywebcommunity.org/what_kind_of_battery_goes_in_a_fossil_watch.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468289/normal_5fce84c1a2aaf.pdfIn PDF document text
    • http://garant-ritual.online/51783837454ko8u6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406455/normal_5fc6cab9daf55.pdfIn PDF document text
    • http://duwinijuj.mypressonline.com/guvowegazib.pdfIn PDF document text
    • http://lumobumekola.getenjoyment.net/how_to_make_a_paper_finger_claw.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
    • http://japinoxizidunub.myartsonline.com/fudezazajemewapixabi.pdfIn PDF document text
    • http://vumamuv.myartsonline.com/what_genre_is_thinking_fast_and_slow.pdfIn PDF document text
    • http://futikuzita.onlinewebshop.net/30565768220.pdfIn PDF document text
    • http://rizivubonulej.atwebpages.com/boards_and_beyond_promo_code_august_2019.pdfIn PDF document text
    • http://jozobudesurarab.onlinewebshop.net/how_to_use_storage_mode_on_lipo_charger.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_off0000ee6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6F 5764 bytes
SHA-256: f8f220a9362c8dba2d021dbc5871d92c56458341914143a0c0e242b2153ff3a4
font_01_sfnt_off000101f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F6 10400 bytes
SHA-256: 4f78cb0a9fbe546370af6d2fd3ef41287cdb8b75b25eece41633903007e3af3d
font_02_sfnt_off0001257a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1257A 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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