Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea932d035d55573e…

MALICIOUS

PDF

77.7 KB Created: 2021-05-13 17:37:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f9f1d74b527a5fe995426c2ec7b7c00f SHA-1: 57f509f9ea7f420f5ce8b5f9aa51c1ebe22c4966 SHA-256: ea932d035d55573ede066406c0fc634c6217edf2e527f5ba1a11e409e56f1ba1
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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://golowaki.ru/strik?utm_term=detailed+world+map+with+latitude+and+longitude PDF link annotation
    • https://pufoxedoj.weebly.com/uploads/1/3/4/4/134438994/noninodigaponilivori.pdfIn PDF document text
    • https://webebusili.weebly.com/uploads/1/3/0/9/130969565/jadenulosugep_wevepixitig_buparakovetok.pdfIn PDF document text
    • http://teplotronic.ru/613814680181zvn5.pdfIn PDF document text
    • http://nudazemuxebabu.22web.org/vizokozazezevenazitadenav.pdfIn PDF document text
    • http://kamini33.ru/favawisibo38jiz.pdfIn PDF document text
    • http://seamanygau.best/moto_z2_360_camera_mod8gpvd.pdfIn PDF document text
    • http://startask.ru/wukidigujopiwifugu02nwy.pdfIn PDF document text
    • https://ruvatekokero.weebly.com/uploads/1/3/1/4/131437102/janawowifi-labosenadaruj.pdfIn PDF document text
    • http://trenolgia.buzz/iphone_12_mini_review_gsmarenaungqb.pdfIn PDF document text
    • http://gufutaca3.xyz/how_to_build_trust_within_your_teamtjlf4.pdfIn PDF document text
    • http://mekarafa.iblogger.org/55902458716.pdfIn PDF document text
    • http://itslm.fun/mele_kalikimaka_andrews_sisters_sheet_musicg85kg.pdfIn PDF document text
    • http://repochka.site/5101858058ax5cu.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/ad0355ea-4ffb-4582-b331-cb46a1d16d0a/washington_dc_museum_opening_hours.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a44295a8-1957-4133-b09a-81696504c0b0/a_court_of_thorns_and_roses_collectors_edition_book_depository.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0efd854b-c5ce-40dd-99e0-4e07d245a9a0/momule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b7edc7b-7e09-429c-9fc3-6e3ab6f5e15a/38424973661.pdfIn PDF document text
    • http://moniladipawi.epizy.com/kaththi_sandai_full_hd_movies.pdfIn PDF document text
    • http://fojofediwesifog.rf.gd/flysky_gt3c_specs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c96d73d-3519-430b-9ec3-6820f8e59ade/what_are_the_independent_and_dependent_variables_in_the_bobo_doll_experiment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b2c7678-395d-4396-888f-7c2d788ff2e5/bofeduposevurinut.pdfIn PDF document text
    • http://nitilidozunu.rf.gd/7536469839.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_off0000f095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF095 5284 bytes
SHA-256: d5babae34589545d8afa5815b3fefcdb123548a250d9a96e22ddc8ad05711e3c
font_01_sfnt_off0001027b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1027B 10768 bytes
SHA-256: cef7c77190f34eec730f134d3a556083aacf75700145d9024da4bed98009b99a

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