Malicious PDF — malware analysis report

Static analysis result for SHA-256 82eb918ce56d92e2…

MALICIOUS

PDF

75.4 KB Created: 2021-02-28 23:07:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 77823b2d3377ccebe087386ecb043a5d SHA-1: c2600701946826bb5437eb5b6af28c8ae65be204 SHA-256: 82eb918ce56d92e254c474220533dadcbb99771ffad8fd3c2f52d16468f73645
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm designed to redirect users. The document body, though heavily obfuscated, contains keywords related to 'Ryobi 1700 psi pressure washer parts', likely a lure to attract clicks on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://golowaki.ru/strik?utm_term=ryobi+1700+psi+pressure+washer+parts PDF link annotation
    • https://cdn.sqhk.co/womawuxinuge/gj6QhaT/learn_english_free_grammar_test.pdfIn PDF document text
    • http://chelobaka.space/femefagojulaf23zg.pdfIn PDF document text
    • http://gebuhrenfrei-mein.com/30693797165u5y4j.pdfIn PDF document text
    • http://getyourcredit.info/jam_wifi_speaker_instructionsicfgd.pdfIn PDF document text
    • http://vsspb.ru/how_to_install_sirius_stratus_7_in_car11uel.pdfIn PDF document text
    • https://cdn.sqhk.co/ziveluki/bgdgjp0/nick_fury_death_captain_america_winter_soldier.pdfIn PDF document text
    • http://dumanejixaw.66ghz.com/newixifezomefosef.pdfIn PDF document text
    • https://cdn.sqhk.co/manuguwe/jjCOwjf/34316465894.pdfIn PDF document text
    • http://viputixezererej.66ghz.com/83544531741.pdfIn PDF document text
    • https://cdn.sqhk.co/rosisole/g9wo5ih/imdb_hollywood_movies_list_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/dugelabomaw/dm9YiiB/20236494497.pdfIn PDF document text
    • https://cdn.sqhk.co/wijelukifap/Ejiihcg/best_hip_hop_music_videos_2019.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fizanotafogibag.rf.gd/93699701728.pdfIn PDF document text
    • http://vubalek.epizy.com/setajixunuwiv.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/pupepojoxigabavino.pdfIn PDF document text
    • http://tijibito.epizy.com/ladofetitafe.pdfIn PDF document text
    • https://s3.amazonaws.com/genukopapovixo/81309050067.pdfIn PDF document text
    • http://bumevibil.epizy.com/abduction_2002_font_free.pdfIn PDF document text
    • http://rewifavad.epizy.com/1468143465.pdfIn PDF document text
    • http://duzuxaxuba.epizy.com/what_is_the_main_theme_of_emersons_essay_self-reliance.pdfIn PDF document text
    • http://gipizaz.rf.gd/baixar_jogo_motoqueiro_fantasma_para_android.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_off0000e9b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B4 5488 bytes
SHA-256: bd23e895a06f013e87b8568c1bd853d7f1f81ed3b837a04369101af3ef2a29c6
font_01_sfnt_off0000fc7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC7B 10404 bytes
SHA-256: 070069dba9c0c969e6a387e4260ef308e0f24fcb346d0dee544f95f2f4698b1c

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