Malicious PDF — malware analysis report

Static analysis result for SHA-256 3283d74b840e6674…

MALICIOUS

PDF

83.1 KB Created: 2021-02-15 09:26:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 87f8bbaf7ff7229a77410eb6c94fa2cb SHA-1: cc6dadbcd3b43d8b628e792352a7357c38d12831 SHA-256: 3283d74b840e6674fdacf8a1e7628f077b486174c4c1c094414451317caf1516
66 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and Weebly-hosted files, indicative of a link farm or phishing campaign. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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://bologen.ru/123?utm_term=gas+powered+lawn+edger+commercial PDF link annotation
    • http://womenit.space/vefopowulopiraj9twmc.pdfIn PDF document text
    • https://jefamozalubibul.weebly.com/uploads/1/3/1/4/131438275/5327269.pdfIn PDF document text
    • https://suxugugufagiwa.weebly.com/uploads/1/3/4/7/134740592/zumasovape.pdfIn PDF document text
    • https://sojozukajarab.weebly.com/uploads/1/3/4/2/134265810/6ca9a430.pdfIn PDF document text
    • http://4escam-bot.online/brand_positioning_bull_s_eye_template85ebx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420589/normal_5fd34d062b250.pdfIn PDF document text
    • http://rrrrkkkkk.space/kowesazinanomipuxepuweerw2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385228/normal_5fd3563ea7f07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465543/normal_600bbb5b1934e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383923/normal_6001bedeaa881.pdfIn PDF document text
    • https://minawitagolufu.weebly.com/uploads/1/3/5/3/135312922/62a33.pdfIn PDF document text
    • https://sozizupisez.weebly.com/uploads/1/3/1/8/131872239/8550373.pdfIn PDF document text
    • https://zuduloto.weebly.com/uploads/1/3/4/6/134623707/c63d904f.pdfIn PDF document text
    • http://bestrongbyg.com/math_flash_cards_for_3rd_gradeap2rv.pdfIn PDF document text
    • http://autolombardpro.ru/faceing_math_lesson_4_answer_key05g0s.pdfIn PDF document text
    • https://netukilegulises.weebly.com/uploads/1/3/1/6/131606016/bivigalo_gejote_miboganuj.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/rivazixexuguri/fuwakupikonazamarufedilo.pdfIn PDF document text
    • http://makuwuwamev.rf.gd/fumaf.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/fokejalurem.pdfIn PDF document text
    • https://s3.amazonaws.com/resisuna/ielts_cue_card_2019_with_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwenoxuzasila/48270664354.pdfIn PDF document text
    • https://s3.amazonaws.com/xipavir/21631110042.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_off000107f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F5 5516 bytes
SHA-256: 931a7c685320237948a31e0705b12f8518bbdbfdb0443cdd85bc2ef75413ed31
font_01_sfnt_off00011ab8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB8 10504 bytes
SHA-256: ecf135cef3a5a9b401036c1ed78e43dab27bcee9594f9b770a21a1c543caf3eb

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