Malicious PDF — malware analysis report

Static analysis result for SHA-256 f193a5561b54fc9c…

MALICIOUS

PDF

73.7 KB Created: 2021-04-19 21:21:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 84f67861908124c51ce2c4af02923780 SHA-1: d3d8564dceadb4a2d0d1bdff6ab53e5807f08727 SHA-256: f193a5561b54fc9c5311ba5e57d4068e4c669a09523efa876f4bfc8b34bebd5e
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to PDF files, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of malicious activity.

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://jottigo.ru/strik?utm_term=techno+gears+marble+mania+mega+instructions+pdf PDF link annotation
    • https://sakiverore.weebly.com/uploads/1/3/6/0/136095660/f6fcb5.pdfIn PDF document text
    • http://wotukujis.sportsontheweb.net/1970_boy_scout_handbook.pdfIn PDF document text
    • https://bezijenogekise.weebly.com/uploads/1/3/4/8/134875893/79c32ef4c658.pdfIn PDF document text
    • https://rijojuno.weebly.com/uploads/1/3/5/3/135310883/6769461.pdfIn PDF document text
    • https://puxonuge.weebly.com/uploads/1/3/1/3/131383548/5b376ad5.pdfIn PDF document text
    • http://xofofumireke.mypressonline.com/american_heart_association_acls_algorithms_2020.pdfIn PDF document text
    • https://temetufel.weebly.com/uploads/1/3/1/8/131856903/74f6068b.pdfIn PDF document text
    • http://xovasaf.iblogger.org/similarity_and_congruence.pdfIn PDF document text
    • http://vixinusagodax.scienceontheweb.net/xiledise.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://dd39d194-9042-494f-90ab-223c96cf8da5.filesusr.com/ugd/5d3909_2e658ba210a8458fb4385d5c9c416c81.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/muvazi/pagigeniwarujowaxijigumuk.pdfIn PDF document text
    • http://nanaxaj.rf.gd/les_fleurs_du_mal_resume.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/ncaa_swimming_championships_2019_psych_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xoferuzu/how_to_start_a_personal_essay_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/dikomavomem/35053747631.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/cleveland_police_reports_online.pdfIn PDF document text
    • https://98771922-91e4-4673-aa0d-7794f4435593.filesusr.com/ugd/b6aaa0_d57c2cca2c4e45d6aa56c964650e4e12.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/womirofop/huawei_y3ii_frp_bypass_apk.pdfIn PDF document text
    • http://karezijejot.rf.gd/51997718281.pdfIn PDF document text
    • https://d7b50aa0-fea3-4edc-ba9e-4ed0094b0c60.filesusr.com/ugd/7f614e_d8d8e23557b24d61bb220be7649f885b.pdf?index=trueIn 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_off0000e267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE267 5660 bytes
SHA-256: 385fa98b3bc241c40a995e3c35fb2e6a8a80abfd6af925b8b164c4b4a7d5a4a4
font_01_sfnt_off0000f577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF577 10632 bytes
SHA-256: 005a6975c2066dc5717beaae379caa83ea7c0419b7beccf52008a936e870940c

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