Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4c2f180a5abcc55…

MALICIOUS

PDF

71.1 KB Created: 2021-05-19 02:28:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 5a7edb678ee0b965fcda351d3abd64bb SHA-1: 29a1fef6fd27af36d28efad15f804c3ee00db0b6 SHA-256: b4c2f180a5abcc551200bdca1813c92d3ab5d0dc5a64588b13aaa9b9edaea883
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 pointing to suspicious domains, indicating a link farm or phishing attempt. The primary URL, 'https://gimoguvi.ru/strik?utm_term=programmation+picot+tome+1+cm1+cm2', is likely used to redirect users to malicious content. ClamAV and ML heuristics confirm the malicious nature of the PDF, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://gimoguvi.ru/strik?utm_term=programmation+picot+tome+1+cm1+cm2 PDF link annotation
    • https://wabibazo.weebly.com/uploads/1/3/5/2/135295983/fejedogefoxopidu.pdfIn PDF document text
    • https://mekufaro.weebly.com/uploads/1/3/5/2/135294947/paserosimowe-razogo-mifef-woluzet.pdfIn PDF document text
    • https://zajuzuvo.weebly.com/uploads/1/3/4/4/134474050/009b7e2f35a1.pdfIn PDF document text
    • https://xuxufidumexed.weebly.com/uploads/1/3/2/6/132681394/vulij.pdfIn PDF document text
    • https://vogaxuruxav.weebly.com/uploads/1/3/4/3/134352923/bedadamorog_vogav.pdfIn PDF document text
    • https://siwetoro.weebly.com/uploads/1/3/0/8/130814297/mudepijutixerifafado.pdfIn PDF document text
    • https://wepubimixojipo.weebly.com/uploads/1/3/4/5/134584552/596d41e5b8e.pdfIn PDF document text
    • https://xekurisiwa.weebly.com/uploads/1/3/4/4/134401096/vexavuduk.pdfIn PDF document text
    • https://nirasiban.weebly.com/uploads/1/3/4/3/134344158/4344267.pdfIn PDF document text
    • https://ditaziretuviki.weebly.com/uploads/1/3/0/8/130874055/jezovosugubuj.pdfIn PDF document text
    • https://malegudupo.weebly.com/uploads/1/3/0/8/130813961/7210833.pdfIn PDF document text
    • https://tepewumulu.weebly.com/uploads/1/3/1/3/131384412/d6bc35b32.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/vibasujefir/ever_night_book_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee345673-4517-46c2-bda9-8916f08dfbf6/excel_vba_pass_multidimensional_array_to_function.pdfIn PDF document text
    • https://s3.amazonaws.com/senodiw/3.5_cloistered_cleric_handbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba5fa527-78b2-413d-900f-f58abb2426b5/what_happens_in_act_2_scene_6_of_romeo_and_juliet.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/14934561931.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa408b57-8193-461f-88a8-921c3aac7305/the_impossible_movie_in_hindi_filmyzilla.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/how_to_make_natural_black_hair_dye_at_home_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/xenavuxa/sowewapudar.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/are_amana_appliances_made_in_usa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2ced60a-9e06-403e-a92d-79408a96646a/susuf.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_off0000d732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD732 5228 bytes
SHA-256: 766e71fafb70ca24dd653f7d73f8c5e83278348f2ea6e7c6a6bc35745d16900b
font_01_sfnt_off0000e8ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EF 11420 bytes
SHA-256: 6a04aceeb56f9de0cb96575bed59fcf12834852160bb3dbfe976513eeffeaae5

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