Malicious PDF — malware analysis report

Static analysis result for SHA-256 076868e7d319127d…

MALICIOUS

PDF

82.0 KB Created: 2021-03-18 20:54:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: c08879495f8f34eb4fed89fd89665b24 SHA-1: a9d0fd60ec89400b0d24e68c0beef6dd2885e367 SHA-256: 076868e7d319127d3127a11a609deb3b7bd15918dc5f6f54ad953476436fc4de
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 6

  • 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.
  • 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://xezojetit.ru/123?utm_term=tamil+tv+channels+app++for+android PDF link annotation
    • https://pezulotum.weebly.com/uploads/1/3/1/4/131483557/nifopevigim.pdfIn PDF document text
    • https://lovaxases.weebly.com/uploads/1/3/4/6/134685664/93e68934051.pdfIn PDF document text
    • https://muzitotixigo.weebly.com/uploads/1/3/1/4/131407705/semenewota.pdfIn PDF document text
    • http://gerda-msk.ru/who_played_sunny_in_a_series_of_unfortunate_events_movie1tkoo.pdfIn PDF document text
    • https://zojovotonoturur.weebly.com/uploads/1/3/5/3/135348007/vuzovazanalexodabe.pdfIn PDF document text
    • https://limowidijepa.weebly.com/uploads/1/3/5/9/135992559/f38e7cd6d3.pdfIn PDF document text
    • http://optarfes.com/dungeons_and_dragons_3.5_fiend_foliop1thp.pdfIn PDF document text
    • https://buxodofuluni.weebly.com/uploads/1/3/4/8/134875319/4d578637c2.pdfIn PDF document text
    • https://sugodaxekot.weebly.com/uploads/1/3/1/8/131872070/5c477.pdfIn PDF document text
    • https://wurilulisewanid.weebly.com/uploads/1/3/4/7/134728532/4254356.pdfIn PDF document text
    • https://xiguvopumodajux.weebly.com/uploads/1/3/1/3/131381006/vebonofej.pdfIn PDF document text
    • http://zdsshop.top/nuzelokbys8.pdfIn PDF document text
    • https://mabamakozipapap.weebly.com/uploads/1/3/4/3/134315796/db1bbf3e7c7fa31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369914/normal_60482177e82eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455376/normal_60334ba0318ea.pdfIn PDF document text
    • https://nusoselif.weebly.com/uploads/1/3/4/4/134470887/dfcc04f6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465394/normal_604e8ea7dee22.pdfIn PDF document text
    • http://dreamingdeveloper.com/refadagobinobakifabevil5hdgz.pdfIn PDF document text
    • https://zitadinenere.weebly.com/uploads/1/3/1/8/131871439/lolejetojiwivaguk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488332/normal_603166a466ffe.pdfIn PDF document text
    • https://viferoxabuged.weebly.com/uploads/1/3/4/2/134235394/46d8ac6daca9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445101/normal_5ff7792536728.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://uploads.strikinglycdn.com/files/4f359180-83bd-43ec-8f7f-9e7f6d37dff8/2012_evinrude_etec_25_hp_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df968217-6239-4fba-a7ef-7240bd45b6ae/how_to_use_bose_500_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/078aec9c-3106-4987-9064-014e52d858c3/definition_of_law_in_blacks_law_dictionary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9990e5c5-b625-407d-9915-0b5ffd1a60ff/how_do_i_program_a_rca_universal_remote_to_my_roku_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f33bdca1-b1a0-4172-a990-864101e1965b/amc_competition_2020_results.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_off0000f660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF660 5192 bytes
SHA-256: ba07f836b599d094c8741ce68486ad765e54e2b7cbca3dd0f694acdc4da09781
font_01_sfnt_off000107df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107DF 10616 bytes
SHA-256: ef1f240e0f9cf5af18cadfab46d9016783a1db81a71a156c1734bc321bc876c1
font_02_sfnt_off00012bda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BDA 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e