Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7aa6b5ae199dd35…

MALICIOUS

PDF

77.8 KB Created: 2021-03-15 05:15:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 5a3d9a4abd89700819b12044d6b304a4 SHA-1: 28fb1de3e00d92ad920263d7b2c944369d9a35f5 SHA-256: e7aa6b5ae199dd3595b8d50596490ddb128b1287776258ed7640aa4af87a64db
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and numerous external links indicate an attempt to redirect users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://soxebez.ru/wix?keyword=m+in+dusty+divot+fortnite+season+7 PDF link annotation
    • https://cdn.sqhk.co/keridola/bhhKJNS/best_bet_shows_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/vanewano/8OgfSNM/miui_10_pixel_icon_pack.pdfIn PDF document text
    • https://cdn.sqhk.co/dufubimaru/gd6gejg/ddpai_mola_n3_dash_cam_review.pdfIn PDF document text
    • https://mizavujubamu.weebly.com/uploads/1/3/0/7/130775062/7319911.pdfIn PDF document text
    • https://cdn.sqhk.co/wimiwupo/fifTFmd/33887085971.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484633/normal_603e8a07eafcf.pdfIn PDF document text
    • https://cdn.sqhk.co/fabokofe/2jhLi15/3._5_mm_audio_cable_with_lightning_connector.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394072/normal_5fde782d255ab.pdfIn PDF document text
    • https://cdn.sqhk.co/dodanadofu/YQZWDjj/formula_2_2020_standings.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450884/normal_5fd2dbfc04645.pdfIn PDF document text
    • https://mufewikusa.weebly.com/uploads/1/3/4/0/134042586/gavizogeremib-zafafuwolivuges-zubebojodumur-sibipivojajux.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368222/normal_5fc711c59767d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409799/normal_5feee1c263d5c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tesaminovosino.epizy.com/zezevokidonexixalob.pdfIn PDF document text
    • http://lurapuven.epizy.com/wewokibulularokosodijeso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24defd8c-c730-487a-9646-deafdc5a4ed8/mastering_the_art_of_social_media.pdfIn PDF document text
    • http://webetiruziri.rf.gd/ti_84_plus_ce_battery_indicator.pdfIn PDF document text
    • http://rivebop.epizy.com/nomimizavuvexutikeruted.pdfIn PDF document text
    • http://xemaneruweveji.epizy.com/54219545235.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b6f7992-5ee7-4435-a808-c23043eeafab/what_is_design_thinking_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17dac321-8427-4ee9-9bef-f35e15fea6b6/craftsman_33_gallon_vertical_air_compressor_manual.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_off0000f4e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4E7 5116 bytes
SHA-256: 967fbf45bd0a5738a01f41ede40e7a68fdca0c51e8cf307bdb062feec073eaf0
font_01_sfnt_off0001067b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1067B 10336 bytes
SHA-256: bf6bb78472aa222440c02dec4ccb3b0f52a8f6fd414865136119b171dd5e3a0d