Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a3414d8fc6f4980…

MALICIOUS

PDF

77.0 KB Created: 2021-02-16 20:26:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 372824fd5c32c69b076bdbfb0284c75f SHA-1: 6bc2e70592f49a9fedd16dc6e5aabc5ac2814eb7 SHA-256: 8a3414d8fc6f49805bf64a912887ca12de7d767e013b481c8c836b636c3d7185
244 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to disposable hosting services, and one critical link to a known malicious redirector. This indicates a phishing or scam attempt designed to drive traffic to malicious infrastructure. The ML classifier and ClamAV detection strongly support the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=how+to+fix+being+unhappy+in+a+relationship In PDF document text
    • https://cdn.sqhk.co/tokititagiwe/ivhhge6/52135611876.pdfIn PDF document text
    • https://cdn.sqhk.co/jirudumom/JKjaZia/next_fight_night_video_game.pdfIn PDF document text
    • https://guxesawaxogego.weebly.com/uploads/1/3/4/3/134314991/6357690.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445869/normal_5fd034ab1b6af.pdfIn PDF document text
    • https://cdn.sqhk.co/sopiloroda/WrsqieC/tuberculosis_test_near_me.pdfIn PDF document text
    • https://malitizume.weebly.com/uploads/1/3/4/0/134097131/4577455.pdfIn PDF document text
    • https://cdn.sqhk.co/tirazirevemu/d4f1c65/domino_s_4032_w._republic_road._battlefield_mo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391903/normal_601a2f631d7c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416796/normal_5fc5d12087fcb.pdfIn PDF document text
    • https://tonofoku.weebly.com/uploads/1/3/4/0/134096462/gomuze-kaves-topokatirasif-wibusuwu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464530/normal_6027067c4baac.pdfIn PDF document text
    • https://cdn.sqhk.co/muruwake/dide8je/the_coupon_boutique.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lulevewutowa.epizy.com/rezinanunivezorajiged.pdfIn PDF document text
    • http://jawegoxizifiti.epizy.com/candy_crush_saga_hack_apk_unlimited_lives.pdfIn PDF document text
    • http://mokufapupajenap.epizy.com/weather_report_yelm_wa.pdfIn PDF document text
    • http://nekaxikafixof.epizy.com/cintas_uniform_sales_glassdoor.pdfIn PDF document text
    • http://sukifimogu.rf.gd/59906400468.pdfIn PDF document text
    • http://pajuzipoxebemo.rf.gd/43808958704.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_off0000f043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF043 5528 bytes
SHA-256: 4fbb99922a4a80cf2b1771910e79928b9daa3ca01f8e0dfe38f67348f32d3f7b
font_01_sfnt_off00010326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10326 10508 bytes
SHA-256: 83afc32fe60caabcbc020574d9a56ecb54f0bff15a170919e87afebb971f5da7

Open this report in the interactive analyzer, or submit your own file for analysis.