Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1886c0ca61b0eba…

MALICIOUS

PDF

69.4 KB Created: 2021-02-19 20:56:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ddbba96ae9db8b7a0e9b122924a3f916 SHA-1: 05b591d60cba3722fd471e843715dbf4c359937b SHA-256: a1886c0ca61b0eba2d4f1db82d82fee28a640522142ed231628513666a4d4767
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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 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://druttle.ru/123?utm_term=what%2527s+open+on+cannery+row PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451348/normal_602d95c67b5d0.pdfIn PDF document text
    • https://lupoxever.weebly.com/uploads/1/3/1/4/131413766/4839970.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492245/normal_5fe3bfc10874d.pdfIn PDF document text
    • https://cdn.sqhk.co/dubeminap/hhPwwcm/mumasiveranebarugi.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/vjaijjb/french_goalscorers_world_cup_2018.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mejizemobimoli.epizy.com/library_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/char-_broil_performance_4_burner_lp_grill.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/tv_channels_app_for_pc.pdfIn PDF document text
    • http://kepujelibip.epizy.com/63668163279.pdfIn PDF document text
    • http://nifibomagogov.rf.gd/coordinate_plane_worksheets_positive_and_negative.pdfIn PDF document text
    • http://jabowedufup.epizy.com/google_docs_excel_spreadsheet.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_off0000d15a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD15A 5228 bytes
SHA-256: f95dbd4b782fc25be546789edcf6dc2b2e387563c798d1b37b5e7c4dac89107e
font_01_sfnt_off0000e341.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE341 11700 bytes
SHA-256: bfa233f6bb50dfd571fa830ea0eb391e9f9df82d8b784f23e31e5944beea8027

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