Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c818551f01b39c8…

MALICIOUS

PDF

75.7 KB Created: 2021-03-03 12:29:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 2bc9dfd76a89df1c61ea434b04004366 SHA-1: 50c9d3a1cb0531dfe06a91615c068dc95d723df6 SHA-256: 1c818551f01b39c80831bd2e383680f624293c5c83f19dedee5dbc03392f4589
156 Risk Score

Malware Insights

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

The file is a PDF that contains a large number of external links, identified as a PDF link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. The embedded URLs suggest an attempt to redirect users to potentially malicious content or phishing sites.

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://jacksth.ru/award?keyword=the+maker+jerry+garcia+band+chords PDF link annotation
    • https://vipofobusaxipol.weebly.com/uploads/1/3/4/2/134234766/zavigegesa.pdfIn PDF document text
    • https://mukozuzaze.weebly.com/uploads/1/3/4/2/134265885/315993.pdfIn PDF document text
    • http://pixunune.sportsontheweb.net/xowotijudogebodavegu.pdfIn PDF document text
    • https://suruwizad.weebly.com/uploads/1/3/4/7/134766156/1165485.pdfIn PDF document text
    • http://pixidilivutep.medianewsonline.com/zoxiberugileled.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pafojamivorizim.epizy.com/hp_probook_6470b_plugged_in_not_charging.pdfIn PDF document text
    • http://golemibafub.epizy.com/what_causes_a_diesel_engine_to_smoke_white.pdfIn PDF document text
    • https://s3.amazonaws.com/dogazisuze/bredon_school_6th_form.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/37410998572.pdfIn PDF document text
    • http://wowutuzineko.myartsonline.com/40570981774.pdfIn PDF document text
    • http://sopidur.epizy.com/kidoniremopukutodimo.pdfIn PDF document text
    • http://bexumasifawej.epizy.com/bavuxezotuxujawitikijo.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/bein_sport_apk_terbaru_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/nalifij/misplaced_modifier_worksheet_middle_school.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_off0000e2b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B6 5652 bytes
SHA-256: 7affc555e86444c05e15b78288194b7ec37f216eaef5946d0ba5fbece59fcafc
font_01_sfnt_off0000f5c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C8 2172 bytes
SHA-256: 8cdf2537d1ab4c05d56649fbca1eb4f14a20c39e6793f0cdf39db56f9d5d8db6
font_02_sfnt_off0000ff2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2C 10048 bytes
SHA-256: cecb10d3c93c1830bb2e76053fea8a42652f32b7d006aba0f9e146e1ef6d19af

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