Malicious PDF — malware analysis report

Static analysis result for SHA-256 38024b5053cbde21…

MALICIOUS

PDF

73.5 KB Created: 2021-06-10 12:00:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2c96c732bbe0c668cdff0b12fb7317db SHA-1: 10c628d9ac84da0b1a6e3e9dbf9acc19c6fd8a7e SHA-256: 38024b5053cbde219ea3559f12880305f6fec4ee3050130530f4114f9ca2c152
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or phishing attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document, likely designed to redirect users to potentially harmful content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://medvor.ru/pbw?utm_term=horizon+hack+client+windows+10 PDF link annotation
    • https://wumikedamuzu.weebly.com/uploads/1/3/4/3/134324885/62515.pdfIn PDF document text
    • https://joposiga.weebly.com/uploads/1/3/5/3/135399072/rawufesoxadapozafew.pdfIn PDF document text
    • https://pobikutilun.weebly.com/uploads/1/3/4/8/134871216/bonewama_suzasogememevu_wenibakolugobe_mojodotomewa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379854/normal_60631558ec235.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379384/normal_602d84127c754.pdfIn PDF document text
    • https://minadefimufev.weebly.com/uploads/1/3/4/6/134635785/monunajafomexivojumu.pdfIn PDF document text
    • https://fadirepux.weebly.com/uploads/1/3/1/4/131438814/cfa51b05.pdfIn PDF document text
    • https://wasafigazepez.weebly.com/uploads/1/3/4/5/134586721/pobozopu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444123/normal_5fd124471ee2d.pdfIn PDF document text
    • https://lewelekokoje.weebly.com/uploads/1/3/4/3/134333059/wekekeseka_nomutudoni_lofiroj_vefevonunisexe.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
    • http://vamafob.pbworks.com/w/file/fetch/144472023/can_i_install_apk_on_android_tv.pdfIn PDF document text
    • http://togiwuvoze.pbworks.com/w/file/fetch/144591312/traffic_rider_hack_mod_apk_download_android.pdfIn PDF document text
    • http://niwomif.pbworks.com/w/file/fetch/144424359/pokemon_planet_free_money_hack.pdfIn PDF document text
    • http://kiwazotomija.pbworks.com/w/file/fetch/144787536/52420321401.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85b4557b-c47d-4f72-ab5c-0644066ff3df/22247755926.pdfIn PDF document text
    • http://foxobekizax.pbworks.com/w/file/fetch/144908319/top_tucker_song_download_mp3.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01edf0b9-0972-4897-ad6e-078be74f7cf3/81000093403.pdfIn PDF document text
    • http://kirozatijawu.pbworks.com/w/file/fetch/144514845/jj_keller_tractor_trailer_driver_training_manual_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85dd37d7-2f8e-48d7-867b-f312916d1068/zepotijuvu.pdfIn PDF document text
    • http://bowawesup.pbworks.com/f/rikupibagapajodu.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_off0000d4f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4F3 5176 bytes
SHA-256: aa6405bbb7c8c0bb479a34fa9603cceb3762ec5adc2cb144d7d176058ee706cf
font_01_sfnt_off0000e694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE694 10644 bytes
SHA-256: d797891f90a095412cbf26f2ccce2763c4452a85b5d091db836a400ceca0af09
font_02_sfnt_off00010aaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AAA 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378