Malicious PDF — malware analysis report

Static analysis result for SHA-256 09baa9a1e8576367…

MALICIOUS

PDF

78.8 KB Created: 2021-03-21 09:17:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 05aa75126959e0335daddf11f9ed19b6 SHA-1: 9009fd80ae97430d44b8e932fcf8a310ea5144e1 SHA-256: 09baa9a1e85763673c30d69d16100dfeef7dee184314a7cbe5b742f6d2b36411
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document, potentially leveraging embedded JavaScript for redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://resalured.ru/123?utm_term=list+of+all+electronic+components+pdf PDF link annotation
    • http://form-lnstagramverifiedbadges.com/hamilton_beach_rice_cooker_manual_37539vbtb9.pdfIn PDF document text
    • http://fafuzum.sportsontheweb.net/how_do_you_read_a_century_battery_date_code.pdfIn PDF document text
    • http://fudoviwil.mywebcommunity.org/xekokeniwavevigaxizuv.pdfIn PDF document text
    • https://cdn.sqhk.co/suvotoruwot/heIigjf/39657705362.pdfIn PDF document text
    • https://cdn.sqhk.co/kuwusemob/Cnjdbf2/international_marketing_notes.pdfIn PDF document text
    • https://cdn.sqhk.co/guzunilepin/jhqZBih/book_antiqua_free_font.pdfIn PDF document text
    • https://cdn.sqhk.co/kakapoxavu/jigiibc/conquest_scents_apparel.pdfIn PDF document text
    • http://rasprodavaika.ru/husqvarna_450_rancher_carb_removales5d8.pdfIn PDF document text
    • https://cdn.sqhk.co/posukomokufi/UWxMjdK/titifesizuzadaba.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://a1c9bafd-2917-4c1b-b79c-a4b44a941470.filesusr.com/ugd/f0f215_3f3b0c0f376d4e029e9199049a7d3c5d.pdf?index=trueIn PDF document text
    • https://748f1d53-d141-46c1-926a-d14fc69713a3.filesusr.com/ugd/e3ed1f_0e26f484c4e14461b5d77adf7f1bca4c.pdf?index=trueIn PDF document text
    • https://41be308f-8a64-4dec-8b30-4937605be974.filesusr.com/ugd/f042fe_51f99c45ca88491ca8a6ae3281f83f82.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/96aee94f-e5fc-4173-b1e9-32498248fafd/dd_5e_planescape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8de9ff8-3e95-4dfb-a95d-bee718c93e75/what_is_a_fellow_colleague.pdfIn PDF document text
    • https://1e16da7b-5b4f-4122-a3c4-5c88c9d97cf7.filesusr.com/ugd/83f04e_5597ac35125f49d9b9b21bce23d0c0d3.pdf?index=trueIn PDF document text
    • http://luvabokinoleg.onlinewebshop.net/10537073977.pdfIn PDF document text
    • https://f43304fd-85e4-489a-8612-81977e01be4a.filesusr.com/ugd/b6f504_1b667cc68f414b948a125e68d5862a4a.pdf?index=trueIn 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_off0000e6f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F7 5028 bytes
SHA-256: 3ec98dba49f1e9d2c0bfe999faf860e1df36641aa98ebbc461969e485dc2d164
font_01_sfnt_off0000f7ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7EA 11700 bytes
SHA-256: 6d43c94ee3686fc499171550649e70737cc1a29aeec72c41601dd61c61c825cf
font_02_sfnt_off00011fcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FCB 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f