Malicious PDF — malware analysis report

Static analysis result for SHA-256 d07a3b6c8f6247a8…

MALICIOUS

PDF

75.8 KB Created: 2021-06-08 05:59:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8d2db2601618af0ce96fd5439f4c4c88 SHA-1: 481a7c792ca837c6ea41c0e55569af241f97e46c SHA-256: d07a3b6c8f6247a8994003f051d22d0e2a835e241b9c8e321988e5b00b54a58f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier. It contains an embedded URI pointing to 'drafthe.ru', which is likely part of a phishing or malware distribution scheme. The PDF's structure and embedded links suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://drafthe.ru/pbw?utm_term=que+es+mi+padre+espiritual PDF link annotation
    • https://static.s123-cdn-static-d.com/uploads/4369502/normal_60b2e42aa9aeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367287/normal_6027a4d37f636.pdfIn PDF document text
    • https://kepemumud.weebly.com/uploads/1/3/1/4/131454984/jatagemabupazaw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366343/normal_5fd1bbae441c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384460/normal_5fd0e93c79b51.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421983/normal_604edeebf3389.pdfIn PDF document text
    • https://tivenudonokokom.weebly.com/uploads/1/3/0/9/130969369/jaxavipup.pdfIn PDF document text
    • https://rigavimiba.weebly.com/uploads/1/3/0/8/130814992/9436808.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/99669c98-ab36-4c70-9813-0dd85bc64239/natural_logarithm_table_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2ac74d4-ba18-406f-89f8-d67e2c8e5dce/consumer_math_b_answers.pdfIn PDF document text
    • http://wisarazed.pbworks.com/f/how_to_level_up_fast_in_bloons_monkey_city.pdfIn PDF document text
    • http://zegakodas.pbworks.com/w/file/fetch/144659178/63595079803.pdfIn PDF document text
    • http://pakesobiroge.pbworks.com/w/file/fetch/144536997/53367216565.pdfIn PDF document text
    • http://kipizasuzeda.pbworks.com/w/file/fetch/144416763/acer_iconia_tab_a200_wont_update.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2054a82a-503f-424e-a6da-f35517149544/2683003845.pdfIn PDF document text
    • http://gapufipi.pbworks.com/w/file/fetch/144656736/how_to_use_the_fios_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4bdfc5e-fefc-424f-af4d-1da7f6c78f21/percy_jackson_the_lightning_thief_movie_songs.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_off0000e8ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8EA 5164 bytes
SHA-256: ecd86bed970f0fe3154e27c6375c11c096a61e7fddb573abf831e4028c7d3a6c
font_01_sfnt_off0000fa57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA57 11820 bytes
SHA-256: bf6caa852a77d49e12b3f1842de0c4dac5d46b971298c9faf1b7dcfa64b4e374

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