Malicious PDF — malware analysis report

Static analysis result for SHA-256 8755f038264e02c2…

MALICIOUS

PDF

89.9 KB Created: 2021-01-21 17:31:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 8031d1dbd1d92bb4f6907503e2d1ea73 SHA-1: 5c155b380ae6c17c732ada960035ebc57e011d62 SHA-256: 8755f038264e02c2693bccad9cbd3559700d894969017de7be394b938926c398
134 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 high likelihood of malicious intent. The document contains numerous embedded URLs, many pointing to disposable hosting services, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' heuristic further supports a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=chapter+3+study+guide+minerals+answer+key PDF link annotation
    • https://site-1172306.mozfiles.com/files/1172306/juwijinurimapopidor.pdfIn PDF document text
    • https://woniwisupu.weebly.com/uploads/1/3/4/2/134266019/wosewe_jifel_wojabokaw.pdfIn PDF document text
    • https://rifusefabizavi.weebly.com/uploads/1/3/2/3/132303317/06faf57.pdfIn PDF document text
    • https://jajajijonox.weebly.com/uploads/1/3/1/4/131453539/muviwopidutar.pdfIn PDF document text
    • https://site-1180682.mozfiles.com/files/1180682/gmail_sync_contacts_groups.pdfIn PDF document text
    • https://site-1236926.mozfiles.com/files/1236926/angry_bird_transformers_coloring_pages.pdfIn PDF document text
    • https://cdn.sqhk.co/sebazisop/ajchgge/mobile_data_automatically_turns_off_for_some_apps.pdfIn PDF document text
    • http://xajaweronasuxo.22web.org/tenant_screening_report_means.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/BghjZ06/tukopub.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://regujivabi.rf.gd/77014248342.pdfIn PDF document text
    • http://pomirunorejuso.epizy.com/43420096384.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/action_games_for_laptop.pdfIn PDF document text
    • http://sijozorugepidu.epizy.com/linkedin_recommendation_for_boss_template.pdfIn PDF document text
    • http://jabepujun.epizy.com/rasunuji.pdfIn PDF document text
    • https://s3.amazonaws.com/dejolavubukugeb/chura_liya_hai_tumne_full_movie.pdfIn PDF document text
    • http://jasosuwer.epizy.com/85396165862.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/84123760562.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000117a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117A2 1528 bytes
SHA-256: 64d53b4318ba7dc869bcefe2c6c56431e6e12bcaf96a32242cfa9e17b755ba3b
font_01_sfnt_off00011f6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F6A 5700 bytes
SHA-256: cdcd71481007f16251f9c8c782d4f16fec7e9c2614433cd517f7c9eb6a011742
font_02_sfnt_off000132b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132B6 11624 bytes
SHA-256: 19f11176ad8681617896faf9fc639161128e02f0065ae3c4fcfc509857d8ea85

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