Malicious PDF — malware analysis report

Static analysis result for SHA-256 fce17b5c92ab5888…

MALICIOUS

PDF

81.5 KB Created: 2021-05-11 14:35:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: d99a748a1688b8d59cc3d5969cd38655 SHA-1: 0bd167506f055de02cffbe614279597d27b363b4 SHA-256: fce17b5c92ab5888a997c68427ada7df8bc88ef4fe0ff125b4b6d23e21bdc75d
126 Risk Score

Malware Insights

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

The PDF contains a high number of embedded URLs, many hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://lozipotod.ru/strik?utm_term=what+is+the+entertainer+personality+type PDF link annotation
    • https://jerupixudenaxi.weebly.com/uploads/1/3/1/4/131437293/6199713.pdfIn PDF document text
    • http://zipafaxelati.sportsontheweb.net/jaluvitubebunujed.pdfIn PDF document text
    • http://vofufime.mypressonline.com/the_admonitions_of_ipuwer.pdfIn PDF document text
    • https://nujalujuxak.weebly.com/uploads/1/3/5/3/135347358/fajodub.pdfIn PDF document text
    • https://vurozagagi.weebly.com/uploads/1/3/4/6/134695821/teguritelaxenu_veveramaraxa_larufemakabetam.pdfIn PDF document text
    • http://nenodipemuxok.mypressonline.com/atem_television_studio_setup_diagram.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476446/normal_60136fafa09c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377704/normal_6020f8e6c5632.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474985/normal_604b7f19cf225.pdfIn PDF document text
    • https://gitapizi.weebly.com/uploads/1/3/2/6/132683136/fefam_xumiwegiguluref_pogakifaruja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464302/normal_600df932c9508.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375194/normal_6006482737a79.pdfIn PDF document text
    • https://fexaxotira.weebly.com/uploads/1/3/5/4/135401388/0a2d783f06da.pdfIn PDF document text
    • http://dogalijun.scienceontheweb.net/citizen_eco_drive_world_time_chronograph_easyjet.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/zevutebulaworel/fagor_pressure_cooker_recipes_fried_chicken.pdfIn PDF document text
    • https://s3.amazonaws.com/xonaxevetaf/13188130374.pdfIn PDF document text
    • http://jopubijako.atwebpages.com/aviation_english_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93904fd7-d063-4813-be3e-2627b09fb7f4/what_is_the_plot_of_fifty_shades_darker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa5bf331-8393-4fe3-b6fe-45a93e4f3e31/how_many_watts_is_ge_profile_microwave.pdfIn PDF document text
    • https://s3.amazonaws.com/gezizefefififa/fraction_wall_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tejuvonixag/google_calendar_icon_show_date_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43a58f40-f98c-4231-96c1-04b778ee6a3b/75290768556.pdfIn PDF document text
    • http://tofilijewok.atwebpages.com/dovodefuvosogebadonuwevi.pdfIn PDF document text
    • http://xolevusafo.myartsonline.com/73616994562.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcc6352a-d7f5-4ac2-862c-09c11db4f9b7/purawagi.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_off000101b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B7 5020 bytes
SHA-256: c4253f25bb1791d51c414f5812beef7a0cd4e166762f58ae701ca5b31f20a388
font_01_sfnt_off000112d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D7 10516 bytes
SHA-256: 33325adc18b84c6a0e8db15f59b49800727c39af07e4ac28607e93150be2dbe5