Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bbe47d38b9deaca…

MALICIOUS

PDF

76.2 KB Created: 2021-03-11 07:01:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: e3cc2d6d91f0e608ee7605178e0b5ae0 SHA-1: ea5a23e873133014dcbf18714ec5b6a0ca981278 SHA-256: 4bbe47d38b9deacae6d41b473eeb99b01e2dc8e299813355e2a538c4aa825798
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, characteristic of a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest an attempt to exploit users through malicious links, aligning with spearphishing attachment tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • 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/strik?utm_term=are+ks1+sats+cancelled PDF link annotation
    • https://gimelasu.weebly.com/uploads/1/3/4/5/134513778/tunifizidafiji_luroxepi.pdfIn PDF document text
    • https://zamovolipizutuj.weebly.com/uploads/1/3/1/0/131070940/fe0021.pdfIn PDF document text
    • https://jifosibupegexuv.weebly.com/uploads/1/3/4/6/134692258/fixobil-makimorewufaki-wojaderijosi-reselurawilenal.pdfIn PDF document text
    • https://pixamowogiru.weebly.com/uploads/1/3/4/5/134590731/7377343.pdfIn PDF document text
    • https://xaxibilezulaf.weebly.com/uploads/1/3/4/0/134096047/3560907.pdfIn PDF document text
    • https://rerararomimin.weebly.com/uploads/1/3/1/3/131383042/1948568.pdfIn PDF document text
    • https://jawokipuroz.weebly.com/uploads/1/3/4/2/134265350/ruvedosoxu-toxipajejikowa-polotizivel-guditas.pdfIn PDF document text
    • https://judorobizud.weebly.com/uploads/1/3/4/4/134455398/tixuvujapegorefaje.pdfIn PDF document text
    • https://lezevonunibo.weebly.com/uploads/1/3/4/5/134577944/9862647.pdfIn PDF document text
    • https://witowufagefalob.weebly.com/uploads/1/3/0/7/130738848/5318352.pdfIn PDF document text
    • https://linekepev.weebly.com/uploads/1/3/4/0/134041162/zukawule.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/luramamelolem/apna_time_aayega_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ac5dd79-341d-458a-b113-8f7834e14f0f/vabezuxoxudadedobul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54f97910-7c0f-4668-aaae-4ce5c7d5db3e/dopupepi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5c26fa2-f3a0-48fc-a439-183e1998c750/38468657169.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/woxutodelutu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ead75892-1c44-497c-899c-f0eb8d1a6fb9/how_do_you_cook_pork_in_a_slow_cooker_uk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffd5edfa-8fd1-4fd6-8167-9a9d3e733731/do_guys_test_you_by_not_texting.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/42635660489.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/561eac45-627c-41ad-a9a6-fe46a51b2a5a/how_to_reboot_apc_ups_network_card.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/kerala_blasters_players_photos_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7062a18-584b-4d49-b0aa-1a8c64086f4b/gefase.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_off0000ed73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED73 5040 bytes
SHA-256: 4a96a8d2d3e8f31b8b47cf5eda45afc4a087b8c29baa5b7b6a9d3c1e327b627f
font_01_sfnt_off0000fea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA6 10704 bytes
SHA-256: 5179e496ed39647c4206ad10e42aec661e2f1b494288702fadfca6730d038ad6