Malicious PDF — malware analysis report

Static analysis result for SHA-256 06c6159277270c9d…

MALICIOUS

PDF

74.1 KB Created: 2021-03-02 03:50:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: da0bff38ce7c9ef9519d9cbabccc5a34 SHA-1: 990b2fddd66e4804f3289c310e5bb680f4f31ef3 SHA-256: 06c6159277270c9d531c3de7fb04ede5f1031bd0b46af304ca9e6257333b4bd5
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier with high confidence. It contains numerous embedded URLs, many pointing to disposable domains and exhibiting link farm characteristics, suggesting an attempt to redirect users to malicious sites. The presence of external URIs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/strik?utm_term=matlab+for+loop+plot+hold+on PDF link annotation
    • https://cdn.sqhk.co/geroterunetu/fOid3gf/veripetajoxeponabo.pdfIn PDF document text
    • http://sevowina.medianewsonline.com/one_punch_man_season_1_vs_season_2_art.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446650/normal_5fef4fa300d24.pdfIn PDF document text
    • http://xijulefabogi.getenjoyment.net/91824232612.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411916/normal_6007cbacbef13.pdfIn PDF document text
    • http://lumobumekola.getenjoyment.net/30934408412.pdfIn PDF document text
    • http://gigezesuzobe.getenjoyment.net/roland_fantom_x6_used.pdfIn PDF document text
    • http://bibuzikufaje.mygamesonline.org/manual_de_impresora_samsung_xpress_m2835dw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427529/normal_6021d3071ff71.pdfIn PDF document text
    • https://cdn.sqhk.co/winogolelog/fhgihjL/7843381294.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446931/normal_5fdd66aeec96a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fisulefajow/job_application_desired_salary_answer.pdfIn PDF document text
    • http://tososite.onlinewebshop.net/how_to_look_up_padi_certification.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/happy_birthday_song_diljit_video.pdfIn PDF document text
    • http://fazetotunoju.epizy.com/tisovegajijujodejalaveme.pdfIn PDF document text
    • http://gajazuwowawe.rf.gd/driver_booster_3._2.pdfIn PDF document text
    • https://s3.amazonaws.com/belapawerezuju/sap_tcode_for_asset_capitalization_report.pdfIn PDF document text
    • http://nununad.myartsonline.com/kokukufufabinamulizi.pdfIn PDF document text
    • https://s3.amazonaws.com/watajive/agriculture_intelligente_definition.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d633.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD633 5096 bytes
SHA-256: 87eb8fa31ce118291f7e5c597681e575e82afca155bf721aaa8e2ac737d6f100
font_01_sfnt_off0000e784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE784 3720 bytes
SHA-256: b91f3c26f37c28538ed09035cbea6f9221827f1e30b50c452f08cc820bcc167b
font_02_sfnt_off0000f2e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E7 12020 bytes
SHA-256: e35abc0a4514983e7b8e003d39574fdf204a8ab0f110a6deeeb914ce1006623c

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