Malicious PDF — malware analysis report

Static analysis result for SHA-256 62c8fff48a15f6af…

MALICIOUS

PDF

74.3 KB Created: 2021-03-28 15:45:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: a5582302bd4cf49a6d0170709b435be8 SHA-1: ec76a13b8bc1d16d3184ce371218cbce8a8b325b SHA-256: 62c8fff48a15f6aff92f5737e9d4b1ac6edf05a15b214b61586962487c927223
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a high-confidence ML classifier and ClamAV, indicating malicious intent. The presence of numerous embedded URLs, many hosted on disposable domains and utilizing UTM parameters, strongly suggests a phishing or malware distribution campaign. The document body, though heavily obfuscated, contains references to 'wkhtmltopdf' and 'Qt', indicating it was likely generated by a tool rather than being a legitimate document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://botokaw.ru/123?utm_term=exacerbation+of+copd+guidelines+nice PDF link annotation
    • http://vofufime.mypressonline.com/66700736377.pdfIn PDF document text
    • http://nomevufaneboja.mypressonline.com/has_forrest_fenn_treasure_found.pdfIn PDF document text
    • https://sixixufur.weebly.com/uploads/1/3/2/3/132303163/wuwugun_xifomusuvex_disezojodulibi_xipopuwuf.pdfIn PDF document text
    • http://discovljzg.fun/170070430613oz8q.pdfIn PDF document text
    • https://walipovagotil.weebly.com/uploads/1/3/6/0/136016519/3518787.pdfIn PDF document text
    • https://sobolone.weebly.com/uploads/1/3/0/7/130775045/fesekokajip.pdfIn PDF document text
    • http://effektzhizni.ru/hik_connect_apk_download_for_smart_tv60egt.pdfIn PDF document text
    • https://kanodofeju.weebly.com/uploads/1/3/5/3/135325650/8726562.pdfIn PDF document text
    • http://dawezedelofeda.scienceontheweb.net/frases_basicas_en_ingles_y_su_pronunciacion.pdfIn PDF document text
    • http://wedevaz.sportsontheweb.net/badminton_court_dimensions_in_meters.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xowilewegiwo.myartsonline.com/steel_magnolias_script_free.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/98600468786.pdfIn PDF document text
    • http://xopalotopobeda.rf.gd/brown_versus_board_of_education_def.pdfIn PDF document text
    • http://lidufaz.epizy.com/suwetobojuzade.pdfIn PDF document text
    • http://madojizekikozor.epizy.com/88153091454.pdfIn PDF document text
    • http://deregugunil.epizy.com/adobe_premiere_rush_mod_apk_download_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/43017819416.pdfIn PDF document text
    • http://tebaputazaxuva.myartsonline.com/tuzudorar.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/nixipisovoxaxegozalos.pdfIn PDF document text
    • http://jitofatukawej.rf.gd/mitipudizivaguwagatazagof.pdfIn PDF document text
    • https://s3.amazonaws.com/bubisifapagefe/checkering_and_carving_of_gunstocks.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_off0000e4d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D1 5488 bytes
SHA-256: 839504a4b427ac77f6a29bc850d4451e63bf1b9fe9f38fe54522c56ba883dbce
font_01_sfnt_off0000f78d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF78D 10840 bytes
SHA-256: c8107cf0cc4e58afc364d8d61721e3551eaaec82e7567d01d53db5b13e0352f9

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