Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7da51514e7f9557…

MALICIOUS

PDF

77.9 KB Created: 2021-06-15 12:04:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 69f42805ff7a5f4f7b1d3a6f66c55190 SHA-1: 04a8d6ae04a7764fd51ac5d1467e9e258a6e99a0 SHA-256: e7da51514e7f95570dd0bf8fda2edf27394068defbaa650159fdf4dcd8afc978
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are hosted on disposable domains, indicating a link farm or SEO spam campaign. The primary URL, 'https://garglob.ru/pbw?utm_term=one+up+on+wall+street+filetype+pdf', suggests a lure to trick users into visiting a site related to financial advice. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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://garglob.ru/pbw?utm_term=one+up+on+wall+street+filetype+pdf PDF link annotation
    • https://xugirudubup.weebly.com/uploads/1/3/4/3/134332480/jowuwidujoxewuguduwe.pdfIn PDF document text
    • https://kutekedutowake.weebly.com/uploads/1/3/4/6/134635623/rawejumopa.pdfIn PDF document text
    • https://xokefazekuli.weebly.com/uploads/1/3/5/9/135992394/2544247.pdfIn PDF document text
    • https://bunonosuvon.weebly.com/uploads/1/3/5/9/135976801/9664ba97.pdfIn PDF document text
    • https://fogujudusimasob.weebly.com/uploads/1/3/4/7/134713994/446829b842ab5.pdfIn PDF document text
    • https://kibanelamuvudu.weebly.com/uploads/1/3/0/9/130969844/lijewepiravoval_mapefirakul.pdfIn PDF document text
    • https://rafafokisot.weebly.com/uploads/1/3/4/7/134738004/217fc8.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/bf15a10c-df77-495c-bffd-abf3046dec7e/bully_lite_200mb_apkobb.pdfIn PDF document text
    • http://sawebaz.pbworks.com/w/file/fetch/144776727/78114057938.pdfIn PDF document text
    • http://kelivesas.pbworks.com/w/file/fetch/144479433/free_download_english_grammar_checker_windows_7.pdfIn PDF document text
    • http://wodupabizel.pbworks.com/w/file/fetch/145049289/adithya_varma_full_movie_in_tamil_dubbed_tamilrockers.pdfIn PDF document text
    • http://gediripu.pbworks.com/w/file/fetch/144708378/zisesene.pdfIn PDF document text
    • http://durerosika.pbworks.com/f/dexekirebunafumifelor.pdfIn PDF document text
    • http://ropotupi.pbworks.com/w/file/fetch/144503421/pitexewadotadafu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6dbe42fd-ddfd-4ac1-83e7-13a983e50ed1/what_are_the_interview_questions_for_computer_science.pdfIn PDF document text
    • http://kufujibumufa.pbworks.com/f/how_to_do_a_voice_clip_on_messenger.pdfIn PDF document text
    • http://funuvutidip.pbworks.com/f/25309947291.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb2305f7-59d8-42c6-a609-1fd98d3868b8/46406197236.pdfIn PDF document text
    • http://dijakezepo.pbworks.com/f/does_dynamic_tension_really_work.pdfIn PDF document text
    • http://jazufawaroj.pbworks.com/f/97406608461.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/729fc281-7ffe-456c-9137-9ac025feabfc/mixugusigutuma.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_off0000f0c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C2 5256 bytes
SHA-256: 263ebecb93cd2f3d8e23cb99225d336b6a490ce18eec8468fba44f27963e6435
font_01_sfnt_off000102c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C4 11940 bytes
SHA-256: 1348eab338dcf90f42d189022af4f5c12e420e052993051f5f2ef700ecb141b3