Malicious PDF — malware analysis report

Static analysis result for SHA-256 b356bdb1a8431df9…

MALICIOUS

PDF

74.7 KB Created: 2021-03-14 10:06:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 97f6de49fc3d12b3868ab797ca87143c SHA-1: 5c25e1aafd468d9b74db5c7fb434ac4861dbb656 SHA-256: b356bdb1a8431df961d2183c6ddf3ba9196f3e096d12d25f0aa2847230a8cce8
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to a domain associated with malware distribution. The document body, though heavily obfuscated, suggests a lure related to a 'Hestra falt guide glove size 11', likely intended to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • 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 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://jumiwimov.ru/wix?keyword=hestra+falt+guide+glove+size+11 PDF link annotation
    • http://alania365.ru/dopixozosusepuziwobixosefxaoxx.pdfIn PDF document text
    • http://azakalaza3.xyz/45326048570ko4cj.pdfIn PDF document text
    • http://idealsit.fun/physical_activity_readiness_questionnaire_canadayedh2.pdfIn PDF document text
    • http://tadefog.medianewsonline.com/career_path_management.pdfIn PDF document text
    • http://wgathering.org/fishing_rod_clipart_png2rf7a.pdfIn PDF document text
    • http://appeal-ig.com/jakojajipaf5hm.pdfIn PDF document text
    • http://discount50it.pro/delta_compound_miter_saw_blade_guardb6dgx.pdfIn PDF document text
    • http://fiziwafofekaku.mygamesonline.org/arduino_lcd_pinout.pdfIn PDF document text
    • http://lnstagramcopyrigtservice.com/free_english_spoken_classes_near_meh8d9m.pdfIn PDF document text
    • http://bujobatibu.22web.org/bumakipobovapadikika.pdfIn PDF document text
    • http://uscarinsurance.info/best_free_daw_for_windows_7_32-bitjrkwt.pdfIn PDF document text
    • http://doucheop.xyz/vominibewepefoi1hi.pdfIn PDF document text
    • http://deromgroup.com/are_ar_15_rifles_legal_in_new_yorka800a.pdfIn PDF document text
    • http://kamini33.ru/gods_of_romeukw07.pdfIn PDF document text
    • http://instacopyrighthelpteam.com/389313541374hwo.pdfIn PDF document text
    • http://salonop.xyz/the_dark_prophecy_booke25qx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://popofisofol.myartsonline.com/nezumutusoxabig.pdfIn PDF document text
    • https://51fd5013-30c4-43d1-89ce-86564632a3b5.filesusr.com/ugd/9f06f8_3e76ce120be748e7bb86a9ca481f164f.pdf?index=trueIn PDF document text
    • http://patazave.epizy.com/pusogopuluf.pdfIn PDF document text
    • https://6129906d-bc82-46a7-99f5-71793a58af3c.filesusr.com/ugd/d162e3_9cca8920ec2048b783506e65a535312d.pdf?index=trueIn PDF document text
    • https://ff9dba89-6132-4485-99c2-ace8a2453124.filesusr.com/ugd/c3f59f_6d4180effdc94ff888df8cd59b102328.pdf?index=trueIn PDF document text
    • http://dolinoko.atwebpages.com/fibepanilejowilu.pdfIn PDF document text
    • http://kagokonutuvep.epizy.com/label_template_4_per_page_landscape.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_off0000e63d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE63D 5200 bytes
SHA-256: 62a2e43cb3d4373d4e0b93f4a0ead8c23223dc936f65a9aaeb0a04c2fcae58e4
font_01_sfnt_off0000f80b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF80B 11420 bytes
SHA-256: 4d18c0cfc7d675b2e96457932d02449c7f616290a381cf8f948bed0c1e09b542

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