Malicious PDF — malware analysis report

Static analysis result for SHA-256 c56a0c334ce78a0e…

MALICIOUS

PDF

82.5 KB Created: 2021-03-22 20:02:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 57bf748f253f86e40b0bf733990ca62b SHA-1: 5793597a854cf1e380aaed85e215445bb5f81f7c SHA-256: c56a0c334ce78a0e1d5e760f4b272524400758ed33691a6fa86dbeec61b6e7c7
194 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://kuzutuzo.ru/wix?keyword=pokemon+go+mod+apk+joystick+2020+android PDF link annotation
    • https://jofuwutiduf.weebly.com/uploads/1/3/4/7/134728528/0c0bd.pdfIn PDF document text
    • http://stikc.xyz/rise_of_steel_v2_0_mod_apk_download7drra.pdfIn PDF document text
    • http://kudonolenukiv.22web.org/give_an_example_of_inferential_statistics_in_healthcare.pdfIn PDF document text
    • http://devgame.design/82853464561m7xcm.pdfIn PDF document text
    • https://laxuruvu.weebly.com/uploads/1/3/1/4/131482832/zudenevabarisunomo.pdfIn PDF document text
    • http://intekzafast.online/81098474834266uo.pdfIn PDF document text
    • http://lovojat.22web.org/78120596175.pdfIn PDF document text
    • http://feyakast.online/how_to_interview_for_a_nurse_manager_positiono8q96.pdfIn PDF document text
    • https://tenubufaz.weebly.com/uploads/1/3/1/1/131164261/xufesazuwumeguwoxov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kikodanaso.epizy.com/how_to_detect_firewall_in_network.pdfIn PDF document text
    • https://1350f94c-8d6f-42b4-8351-24983ad6a49a.filesusr.com/ugd/4aae87_1852242e3f1246c7a2e8fd9762721eaf.pdf?index=trueIn PDF document text
    • https://1416a32c-f91c-4ec3-9c10-bfdf610c7df7.filesusr.com/ugd/76de1a_d1324f8b61974d07bc3e94e87e2b67d7.pdf?index=trueIn PDF document text
    • http://jepameji.rf.gd/inteligencia_emocional_libro_completo.pdfIn PDF document text
    • http://mikololimudipu.rf.gd/zadiriza.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/95987612722.pdfIn PDF document text
    • https://0ea1ff7f-05b3-43a2-9744-178351a05ed1.filesusr.com/ugd/01f9b9_b420dd260c1e42e184116b89ef93548c.pdf?index=trueIn PDF document text
    • https://43e59f28-96d7-4988-bcd6-55bc25f76e69.filesusr.com/ugd/372bdc_359b0892caed4816a2880f48da28751a.pdf?index=trueIn PDF document text
    • https://933527c5-e005-4225-a3aa-05fee46c7696.filesusr.com/ugd/b51dd5_7dc806d823f74eb881688b8f5a9ea710.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/padosumifubobo/what_does_pali_mean_in_spanish.pdfIn PDF document text
    • http://vamovatalugoja.epizy.com/windows_emulation_on_android.pdfIn PDF document text
    • http://jiporeve.epizy.com/41413972689.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBE 5876 bytes
SHA-256: ccce3ffde4041e67b298cad68751a572ef5e59adfbfadd17c8d50825241be687
font_01_sfnt_off000101c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C2 10640 bytes
SHA-256: eacf5f8c68627c74feebe1134c7da09eb635461c1b54d8e46e9f48bdaa81e9ee
font_02_sfnt_off0001260f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1260F 16660 bytes
SHA-256: 71fe66e8a900eabe62c773f6b9b467243c87e6d484dd0ea34a22194082714177