Malicious PDF — malware analysis report

Static analysis result for SHA-256 30403a5715fb9cc2…

MALICIOUS

PDF

77.1 KB Created: 2021-04-30 19:26:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 05dfd7cd943c6c70505ef8f6c0d37756 SHA-1: 0a871b6c73884393117f1e3d92de9f4aca7dd78a SHA-256: 30403a5715fb9cc24208b3bc8bb88101a6326b4885025cd01a990ba9be8656ca
156 Risk Score

Malware Insights

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

The PDF file contains a lure related to furnace maintenance, but also includes a significant number of external links, many of which are to benign-looking PDF files. However, one critical heuristic indicates a PDF link farm, and another critical ClamAV detection identifies it as Pdf.Phishing.Trojan. The embedded URL points to a suspicious domain, suggesting a phishing or malware distribution attempt. No scripts were extracted from this sample.

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 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://xajibur.ru/strik?utm_term=how+to+turn+on+goodman+furnace+pilot+light PDF link annotation
    • http://senigudalow.iblogger.org/4412123499.pdfIn PDF document text
    • https://vabisoxapulaji.weebly.com/uploads/1/3/4/4/134444495/fatugavusupon.pdfIn PDF document text
    • https://nedidibizexoba.weebly.com/uploads/1/3/0/9/130969065/b01220a.pdfIn PDF document text
    • https://tuvugeti.weebly.com/uploads/1/3/4/1/134108896/pinowovipofido.pdfIn PDF document text
    • http://fusubakitakudup.66ghz.com/35084781580.pdfIn PDF document text
    • https://depovazopalixu.weebly.com/uploads/1/3/2/6/132681382/roparirutal.pdfIn PDF document text
    • https://lokeduvedip.weebly.com/uploads/1/3/4/8/134885922/nitiwikop_manozixi_dakegimiveb_gotediguvebamo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/beginner_esl_prepositions_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/77872570912.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/chahun_main_ya_na_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/ball_bearing_size_chart.pdfIn PDF document text
    • http://sobixuwuv.rf.gd/fetal_circulation_and_changes_at_birth.pdfIn PDF document text
    • https://s3.amazonaws.com/mufukep/rizarelurival.pdfIn PDF document text
    • https://4edd92ed-4e96-4c3d-a837-a16c7246ae9e.filesusr.com/ugd/7c3149_bd83c8b2511648409f9d0a3b5ac35f7f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kubedukowug/27561023605.pdfIn PDF document text
    • http://jiguluvosasibun.epizy.com/vidmate_hd_video_app_free_2.pdfIn PDF document text
    • https://s3.amazonaws.com/rimejiguvif/girl_interrupted_film_analysis.pdfIn PDF document text
    • http://sobogewas.epizy.com/dakhla_surf_report.pdfIn PDF document text
    • https://s3.amazonaws.com/sizabo/archero_chapter_5_boss_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/povadakemixowururuto.pdfIn PDF document text
    • https://f84ffea9-2755-49c2-9cb5-47ca8b55fe65.filesusr.com/ugd/0adedf_d82359b35a8f476a9020a724571d22a1.pdf?index=trueIn PDF document text
    • http://zojimako.rf.gd/bolt_tightening_sequence_chart.pdfIn PDF document text
    • https://6afed14e-2b01-442b-8c2e-11a8a6f39965.filesusr.com/ugd/46a5ae_e0762e4c79ec4739bb9e8b3bf74992ad.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_off0000ee62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE62 5444 bytes
SHA-256: c01c740bdc464cb4b1e5ba7a9ae25814e821509530d999f1d883a2f671ebd14d
font_01_sfnt_off000100ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CE 10724 bytes
SHA-256: 2864f1873fd5211d24f828d5c82d544640ebd6761e52aadb6219ea0194761794

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