Malicious PDF — malware analysis report

Static analysis result for SHA-256 c97c48b36b2bc49e…

MALICIOUS

PDF

84.9 KB Created: 2021-04-27 05:43:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 7938d85197b00e3abe3ef350300cccd2 SHA-1: c1932e441a5821d7491d231854b68d038ba84815 SHA-256: c97c48b36b2bc49e23c83be2172d4a2e1cef4a08d80c62a2f8c6099664554f4c
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs suggest it's designed to redirect users to potentially malicious sites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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/strik?utm_term=casio+ga-100-1a1dr+g-shock PDF link annotation
    • https://fatitabo.weebly.com/uploads/1/3/4/7/134757356/1820561.pdfIn PDF document text
    • https://zexexoxanevekig.weebly.com/uploads/1/3/4/6/134672397/2047351.pdfIn PDF document text
    • https://nurafotupitu.weebly.com/uploads/1/3/4/4/134495453/vanusonowiwonu_velipexezidu.pdfIn PDF document text
    • https://cdn.sqhk.co/rizikodeni/N7jiih5/femupedizafamapoz.pdfIn PDF document text
    • https://xudomulur.weebly.com/uploads/1/3/4/0/134040538/956774.pdfIn PDF document text
    • https://pulezigo.weebly.com/uploads/1/3/4/6/134600697/vofurabodibo.pdfIn PDF document text
    • https://pijaxulejogelub.weebly.com/uploads/1/3/0/8/130874219/zomotexoz.pdfIn PDF document text
    • http://e-devletturkiyeaidatsistemimgovtr.com/45071155025aphrx.pdfIn PDF document text
    • https://xokebewogaxuwu.weebly.com/uploads/1/3/4/5/134588239/5666015.pdfIn PDF document text
    • https://xoxigukot.weebly.com/uploads/1/3/4/8/134861038/jelepejeduzibe_nogeregolim_zoruwofune.pdfIn PDF document text
    • https://cdn.sqhk.co/reruzemafow/gghYjjD/zezamaja.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/jfByjif/kirexokiluvofiganiji.pdfIn PDF document text
    • http://ygrash.website/conners_3_self_report_questionnairesrb5s.pdfIn PDF document text
    • https://cdn.sqhk.co/fedelubu/ZjcEieR/69509598973.pdfIn PDF document text
    • https://cdn.sqhk.co/zovaratigu/4jfHY2F/spina_bifida_symptoms_while_pregnant.pdfIn PDF document text
    • https://fogujudusimasob.weebly.com/uploads/1/3/4/7/134713994/jimidevosib-jewuwi.pdfIn PDF document text
    • http://forexgeeks.net/jateg527zt.pdfIn PDF document text
    • https://cdn.sqhk.co/fepebage/iJsIjhE/mx_player_web_series_in_usa.pdfIn PDF document text
    • http://gooddevice-online.com/dragon_rampant_guleshtx6d.pdfIn PDF document text
    • https://cdn.sqhk.co/zoboxoba/Ijahdii/vegas_to_zion_national_park_bus.pdfIn PDF document text
    • https://cdn.sqhk.co/moserusoba/vhc3Lji/wifi_software_update.pdfIn PDF document text
    • https://cdn.sqhk.co/sozivowemin/lwgdiiD/largest_kodiak_bear_weight.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
    • https://s3.amazonaws.com/lebaxa/what_is_humphrey_visual_field_analyzer.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/bts_guidelines_unilateral_pleural_effusion_adults.pdfIn PDF document text
    • https://s3.amazonaws.com/tixedujegibex/what_is_an_extended_metaphor_in_literature.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_off0000fef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF0 4968 bytes
SHA-256: 76e1f5f74f2c573b623576ac5b0da5b3093bfe9bc73eb3a0b36012ef6e97f2e0
font_01_sfnt_off00010fe6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FE6 11200 bytes
SHA-256: 10833589aeb835bc2bd97354e4ce8e67b7c4e07116929f3638b668b31447eb03
font_02_sfnt_off00013611.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13611 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3