Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c4348eb7ea5f72c…

MALICIOUS

PDF

88.0 KB Created: 2021-04-21 14:23:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9e80fca92f0d971220d75a44c326634f SHA-1: 4ea1968f3033c2c3537a72a2addd57cd21a71a9b SHA-256: 5c4348eb7ea5f72c706088c30db20eaf46ee048c7aaeb9971a4b1a2d35e42771
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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://golowaki.ru/strik?utm_term=how+to+pair+tws+i7 PDF link annotation
    • http://fasusugexewi.22web.org/63138839916.pdfIn PDF document text
    • https://xugubevowasisof.weebly.com/uploads/1/3/4/8/134885616/7917932.pdfIn PDF document text
    • https://nobuzuza.weebly.com/uploads/1/3/4/7/134757083/kibeki.pdfIn PDF document text
    • https://womegirig.weebly.com/uploads/1/3/4/5/134506381/dogozanasunuxod_bufeluwelasoro_zuwiva.pdfIn PDF document text
    • https://vunorozixu.weebly.com/uploads/1/3/1/1/131163876/7e333337d2.pdfIn PDF document text
    • http://zofugam.iblogger.org/xabumibebete.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/jagux/addictive_drum_2_full_version_gratis.pdfIn PDF document text
    • http://tabunubefuxa.epizy.com/always_on_display_s9_plus_apk.pdfIn PDF document text
    • https://54179944-c6a3-49b3-9462-5d1939b6aff2.filesusr.com/ugd/49f5ef_7600ea65ce88429fabac5efe25f07c93.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tonisefoteka/zmodo_camera_setup_help.pdfIn PDF document text
    • https://s3.amazonaws.com/zolerazowubow/japanese_cooking_book.pdfIn PDF document text
    • https://d17f4099-ecc1-42b1-9c73-51521793457c.filesusr.com/ugd/4a2613_c027a82137bd4bb7aedb3877bfdf6261.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/purawuma/guideone_insurance_jobs.pdfIn PDF document text
    • https://5071cc05-3fa2-46b1-b944-d2523ca4b51d.filesusr.com/ugd/62e2c1_0b2cfebffd3e4ed3908e940af5d93e65.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/financial_administration_act_2003.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/lukulezatulisuvulik.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/8478415799.pdfIn PDF document text
    • https://s3.amazonaws.com/xewamejixolefaj/31989842649.pdfIn PDF document text
    • http://zosujudete.epizy.com/how_can_i_check_business_credit_report.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_off00010dda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DDA 4480 bytes
SHA-256: 00402dd82371a990f4af84e5b4ed7eedf9d20d240efcbc8997f4e257c0f09ddc
font_01_sfnt_off00011d23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D23 11624 bytes
SHA-256: d75b68eb1b4d3478693ee8b41ce0538368d861df5c3da94e6949dd5f3f635ad1
font_02_sfnt_off000144cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x144CC 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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