Malicious PDF — malware analysis report

Static analysis result for SHA-256 51acfaa62c7888eb…

MALICIOUS

PDF

71.6 KB Created: 2021-03-28 09:47:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 670febfcfd76d05da877f79291542474 SHA-1: 1adfb9be5afc54f728110d5cfc515ba00b3f68a8 SHA-256: 51acfaa62c7888ebde4dc653ab8ed40ad81accc0fcfef7d8c2648dbccf6ef0de
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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://dugedepap.ru/123?utm_term=agreement+format+between+two+parties+pdf PDF link annotation
    • http://jarizodej.22web.org/bidepopuzof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470400/normal_6047edbcea160.pdfIn PDF document text
    • http://flash-sar.online/best_gre_words_app_ios1fnds.pdfIn PDF document text
    • http://pristav.pro/xorunanoxanabugoweloet0gi.pdfIn PDF document text
    • http://znasila.ru/the_walking_dead_october_1jn32p.pdfIn PDF document text
    • http://rukozhop-guide.com/chambers_europe_guide_20192zzqe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413243/normal_601923738c48e.pdfIn PDF document text
    • https://suwekamepegatir.weebly.com/uploads/1/3/2/6/132682685/gozaxemujuzovulu.pdfIn PDF document text
    • http://itagreen.fun/world_war_3_mod_apk_revdlnti13.pdfIn PDF document text
    • http://natorg.fun/natefiloxiweroxivojizurqcbx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471692/normal_602c66b412bf1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462732/normal_5ff0c811a478c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486045/normal_6029e7baeea9b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401538/normal_604b482fcca3c.pdfIn PDF document text
    • https://xutepokukofegik.weebly.com/uploads/1/3/5/3/135391302/jeritugone_gapirinawijapal.pdfIn PDF document text
    • https://sedanafijokam.weebly.com/uploads/1/3/4/8/134888359/nususobewesa.pdfIn PDF document text
    • http://cparta.moscow/bangla_english_video_ingrsysf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419194/normal_5ffb067adcc44.pdfIn PDF document text
    • http://flathead.us/baudelaire_the_painter_of_modern_life34gfx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pozuzedudakuv.epizy.com/lebizu.pdfIn PDF document text
    • http://bimilenalo.rf.gd/android_9_fr_samsung_tab_s3.pdfIn PDF document text
    • http://jupanifoz.epizy.com/occupational_health_and_safety_act_regulations.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_off0000dbfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFC 5552 bytes
SHA-256: 8b6d9c778032109776e6c124185ca4215c54b518b05e01de48179f096c896d43
font_01_sfnt_off0000eed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED2 10064 bytes
SHA-256: 8c96ae3b475b9e04b24ad35db021996d64ac05561945d2d3014573b86f91ee0f

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