Malicious PDF — malware analysis report

Static analysis result for SHA-256 80d5710344d469c5…

MALICIOUS

PDF

88.0 KB Created: 2021-05-03 22:58:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 178d59e15de33cc7ce0dbeed0c5ff221 SHA-1: 1064904272c4e187fbf24c8287904a1d5dfded61 SHA-256: 80d5710344d469c524ce95b119b99a559c51cf7dcca1bd525eac5d8016d282bd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9993

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 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://midufefew.ru/strik?utm_term=what+does+the+word+divine+intervention+means PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4501361/normal_602d1e667705d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494891/normal_5fe2faa7abe36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393369/normal_6057fc1f0423f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375095/normal_602b8600466ae.pdfIn PDF document text
    • http://goriwekaparagi.iblogger.org/29021201207.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447906/normal_603b4b79bd1b7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/add971b5-2723-4039-b7db-80de2bd109fa/zovaburabezotakatudix.pdfIn PDF document text
    • https://s3.amazonaws.com/biwubeleba/48909502096.pdfIn PDF document text
    • https://s3.amazonaws.com/pipaneku/vascular_malformation_brain_hemorrhage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c93c30fa-04b0-4186-9193-037918b38102/legapafabilapagi.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/computer_security_principles_and_practice_solutions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a97e7264-0042-4624-ac16-5384f4d4deb4/raisers_edge_database_manager_salary_range.pdfIn PDF document text
    • http://maxefaronuxugur.epizy.com/gibapugifuzavibarakimigo.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/16983065331.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00734fe0-bc8a-4a71-9dbc-fca7ed6cec1b/ladofofom.pdfIn PDF document text
    • http://momerizimapunu.epizy.com/vowako.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76da8050-c764-4c26-a2c3-570e314cd9c8/all_the_things_you_are_chords_ukulele.pdfIn PDF document text
    • http://semiwexojexudu.epizy.com/xudolobabobexobijugided.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24ff8d56-a2d5-4d6f-99d9-75ee06beaf9c/17208289396.pdfIn PDF document text
    • http://zepuwiz.atwebpages.com/7281524662.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a61d5725-8d33-4fbb-9b14-8a1773f81285/dr_seuss_sleep_book.pdfIn PDF document text
    • https://s3.amazonaws.com/nilafafakem/lexebiduzoz.pdfIn PDF document text
    • http://jokubamobivavum.onlinewebshop.net/digital_marketing_definition.pdfIn PDF document text
    • http://luzutajezilako.rf.gd/8893027560.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_off00011a70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A70 5200 bytes
SHA-256: 01815e8cdb8ff39f90321748fa50bca50587d8f872a72e9ca156d04c5659cc99
font_01_sfnt_off00012c0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C0E 10612 bytes
SHA-256: d8f8d10b84aed69236bcf425d1cfa3256558749c72dfbce43cef32187ac6823f