Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8e2c93348c58778…

MALICIOUS

PDF

76.5 KB Created: 2021-03-25 04:03:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: af81bdf30b2b300247e594c8bc478a23 SHA-1: 05d68734ceb59b0c682cc7634c8e33925d884171 SHA-256: b8e2c93348c58778d972d5032bb57665716f5f08d0dd181a249876bea7071f9e
126 Risk Score

Malware Insights

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

The PDF file contains multiple heuristics indicating malicious intent, including external URI references and a high ML classifier score. The embedded URLs, particularly 'https://mezovuduw.ru/award?keyword=assembler+deux+pdf+gratuit' and 'http://instapriz.site/will_dermestid_beetles_eat_brainsg9yd1.pdf', suggest a phishing or malware distribution lure. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with attempts to trick users into visiting malicious sites, likely as part of a spearphishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://mezovuduw.ru/award?keyword=assembler+deux+pdf+gratuit PDF link annotation
    • http://instapriz.site/will_dermestid_beetles_eat_brainsg9yd1.pdfIn PDF document text
    • https://cdn.sqhk.co/moromasi/fjihfjj/lefagoxubuse.pdfIn PDF document text
    • http://tertov.xyz/riguvefukadeforimosp2jco.pdfIn PDF document text
    • https://cdn.sqhk.co/bisidilit/ecfgipV/bevitow.pdfIn PDF document text
    • https://cdn.sqhk.co/buzomesil/sgcjjoD/mumefege.pdfIn PDF document text
    • http://ellmax-site.xyz/sinugurutatineuyt.pdfIn PDF document text
    • https://cdn.sqhk.co/videmixolute/higi6ij/roku_remote_not_working_volume.pdfIn PDF document text
    • http://ing-cliente.com/55378580634zbfyo.pdfIn PDF document text
    • http://closemaze.com/easy_origami_swan_instructionsp4eau.pdfIn PDF document text
    • https://cdn.sqhk.co/famagafe/Bofgdgh/tik_tok_application_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jusakurufawotol.rf.gd/napaxobon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26f9290e-7234-4249-955c-09948fc21fc9/target_black_and_white_christmas_decorations.pdfIn PDF document text
    • https://92923600-264c-4cb8-9d87-181083d4f0d6.filesusr.com/ugd/0bf43f_2f3ff9c7e9b746fbb232f1d7c1c4122b.pdf?index=trueIn PDF document text
    • https://1ae094b9-110d-4377-a83c-911b29edd90d.filesusr.com/ugd/d5eada_4f85732b9f7e42c9aa2289f17a3928f3.pdf?index=trueIn PDF document text
    • https://01d7ec8a-e38e-4e33-8c76-1be31754498b.filesusr.com/ugd/24d943_4320666465ac4bee82a97f1a4d57aac5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4636740-5366-4439-b810-d5d9fab043a5/pekono.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/442f94a0-0068-4890-be3f-d27c33d653ee/tuck_everlasting_chapter_17_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2269de22-145f-4389-9b2b-70cd55784391/xinevozipajuvajolazodimev.pdfIn PDF document text
    • https://adea4596-07c4-4c45-ba97-107779ed6dc5.filesusr.com/ugd/5bd9e2_f6655dc9cf494c3795352db27e6fbe61.pdf?index=trueIn PDF document text
    • https://c4bedd8b-a3e9-4aa8-9751-a6fde4035b7e.filesusr.com/ugd/037f08_41426f605b094e3ebd2ec65c8aaf7e85.pdf?index=trueIn PDF document text
    • http://dukizovisepo.rf.gd/gikunomiladupetekipow.pdfIn PDF document text
    • http://wodutedemozaw.epizy.com/what_is_the_most_kind_personality_type.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_off0000e8f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F1 5556 bytes
SHA-256: 3434a27e1e6cde4e95b5e95d88c3a7e6b14d415fab3fec1edf80cb2cc0af737a
font_01_sfnt_off0000fbba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBA 12248 bytes
SHA-256: 8364145e73eb775e7ba57f146f5f6ff62561c5f8feda75b9cda1fd891be01135

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