Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8e3ce91ffee5829…

MALICIOUS

PDF

141.2 KB Created: 2021-03-07 05:40:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 8e077f7279e29323444c9a9d9382c00c SHA-1: a1f043d94124c1de354a09c10110cc8b65a593b0 SHA-256: d8e3ce91ffee58299a29bbfb763aafd9a873a6b77aebdf08f627bff51e0297cb
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs, with a significant portion hosted on disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the PDF structure and embedded URLs point towards an attempt to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://lozipotod.ru/wix?keyword=swashbuckler+build+pathfinder PDF link annotation
    • https://cdn.sqhk.co/vilubofi/jhjj3jh/download_tower_conquest_mod_apk_terbaru.pdfIn PDF document text
    • http://pejurazatox.iblogger.org/how_to_clean_black_and_decker_coffee_pot.pdfIn PDF document text
    • https://cdn.sqhk.co/wigatozaduw/hCiggf2/zekusirixazevuro.pdfIn PDF document text
    • http://rusakova.space/marine_net_warfighting_answersvrioo.pdfIn PDF document text
    • http://nuvuzujujafusu.22web.org/kuzivig.pdfIn PDF document text
    • http://heleogose.online/what_is_the_natural_rate_of_unemployment5f4ov.pdfIn PDF document text
    • http://dirtygirl.fun/fictional_narrative_writing_examples_5th_grade4a01p.pdfIn PDF document text
    • http://kellys.space/walaikum_assalam_images_freesv3ll.pdfIn PDF document text
    • https://cdn.sqhk.co/nowovadizeb/64olo5m/fixosesijemalawan.pdfIn PDF document text
    • http://silvanozito.online/how_to_cook_chicken_nuggets_in_a_microwave5oldw.pdfIn PDF document text
    • https://cdn.sqhk.co/reparepoki/TsAYNii/wabewapodugudevekowetov.pdfIn PDF document text
    • http://goldstein.capital/18231561264jwbcp.pdfIn PDF document text
    • http://giocodigital.website/alphabet_sheets_for_kindergartenmqdty.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/e5b6a3d5-4b71-44c5-b523-14a17d798b6c/hamlet_movie_mel_gibson_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/persona_5_butterfly_kiss_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/53012403244.pdfIn PDF document text
    • http://memekafese.rf.gd/37922549901.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9d5aca7-6eec-4e14-bfb9-0383adf6f13b/how_to_redact_in_adobe_acrobat_pro_dc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9521e30-5afb-4d31-b4bc-a216bdd2251a/55512248008.pdfIn PDF document text
    • http://fodiwivovekuvut.epizy.com/feed_analysis_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ffc62842-73f4-4cd5-a1ca-56a8b3d233e8/51311220528.pdfIn PDF document text
    • http://zefawosejek.rf.gd/vepovirede.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/android_floating_action_button_image_size.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_off0001ecbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1ECBB 5644 bytes
SHA-256: 0884540ac301791e0ef63ceefe80abec56ab5ca7e5265a1274a087ae30daacef
font_01_sfnt_off0001fffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FFFA 12128 bytes
SHA-256: de9df218f616a57a031017ba565716bf62ef72415a33b9ca30d355763e5cf4d1

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