Malicious PDF — malware analysis report

Static analysis result for SHA-256 c419ef5551f61954…

MALICIOUS

PDF

71.7 KB Created: 2021-03-24 21:43:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9451c0ef04a8d8270d53b1fd1f61453f SHA-1: 9c02924b6034505438b9bcdc2549958e6ace7487 SHA-256: c419ef5551f61954a5c8de332012f1736feb460fcedba7cf736df162c9f29741
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 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://bologen.ru/strik?utm_term=what+are+some+social+problems+in+the+united+states PDF link annotation
    • https://wefogazasu.weebly.com/uploads/1/3/4/8/134880183/pubejadodexonew-buvuxujufijer.pdfIn PDF document text
    • https://jejusutib.weebly.com/uploads/1/3/0/7/130740078/a464b75327.pdfIn PDF document text
    • https://cdn.sqhk.co/jarogofef/fjdMFjh/44694476824.pdfIn PDF document text
    • https://meboropob.weebly.com/uploads/1/3/2/7/132740462/4289201.pdfIn PDF document text
    • https://cdn.sqhk.co/gepumenujeme/wN3Rghe/cooperative_gameplay_2_player_ps4_games_split_screen.pdfIn PDF document text
    • https://lorotorerusut.weebly.com/uploads/1/3/1/4/131452969/puzamorur.pdfIn PDF document text
    • https://tuvukorop.weebly.com/uploads/1/3/1/8/131857527/1376cd241969.pdfIn PDF document text
    • https://filofasifujutoz.weebly.com/uploads/1/3/0/8/130874575/mukunipa.pdfIn PDF document text
    • https://fewojejano.weebly.com/uploads/1/3/4/3/134348079/2285488.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwadezab/ibjjhdU/train_control_games_app.pdfIn PDF document text
    • https://megeludok.weebly.com/uploads/1/3/4/5/134595993/jekefe-supukakowax-webeleraxovot-xalufivemog.pdfIn PDF document text
    • https://cdn.sqhk.co/bufomofa/ejeNXv1/61271896450.pdfIn PDF document text
    • https://safapovajedetux.weebly.com/uploads/1/3/4/6/134642125/575347.pdfIn PDF document text
    • https://fumasidabufip.weebly.com/uploads/1/3/0/7/130775820/fiwijipikofagam-gamokixaxa.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/nademopor/job_handover_template.pdfIn PDF document text
    • https://s3.amazonaws.com/dojivewobasuval/46705728714.pdfIn PDF document text
    • http://sapataxetawot.epizy.com/bruel_and_kjaer_4231_manual.pdfIn PDF document text
    • http://mijunuwe.epizy.com/candlestick_chart_study.pdfIn PDF document text
    • https://s3.amazonaws.com/luxaduzimase/japasuxesukex.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/77831336276.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/photo_card_maker_templates.pdfIn PDF document text
    • http://zusagijumetuze.epizy.com/osteonekrose_os_cuneiforme_mediale.pdfIn PDF document text
    • http://tukatolenavu.rf.gd/adding_fractions_with_same_denominator_worksheet_tes.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_off0000cef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF1 5348 bytes
SHA-256: 88e3b944df2e046a4609c48438a099e4e5b03573f0e65ed0aec5e4555d7c90ea
font_01_sfnt_off0000e0f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F4 9832 bytes
SHA-256: 0eb491889cd30196a024ea935b724c8b4d830bcdf06fe4893c61229c0e1c1ed2
font_02_sfnt_off0001029d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1029D 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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