Malicious PDF — malware analysis report

Static analysis result for SHA-256 61fcfac03444c2e2…

MALICIOUS

PDF

74.5 KB Created: 2021-03-07 21:12:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3f4ba3c6a74c9cc1f741f1f874dfa991 SHA-1: 4f9ab9c7432566596eb8027c93fe92f5817234c7 SHA-256: 61fcfac03444c2e27910e410127b832f47b483256c192f9e73cf3236b9d32747
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to a 'golf cart bill of sale', likely intended to direct users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://soxebez.ru/wix?keyword=golf+cart+bill+of+sale+georgia PDF link annotation
    • https://cdn.sqhk.co/tesolivu/ghypgjf/68392808312.pdfIn PDF document text
    • http://dapurixid.sportsontheweb.net/did_the_fall_of_rome_happen_quickly.pdfIn PDF document text
    • https://cdn.sqhk.co/wejawujagi/gjPXUhc/change_keyboard_function_keys_windows_10_lenovo.pdfIn PDF document text
    • https://zexajupa.weebly.com/uploads/1/3/4/6/134692079/binur-nulukuve.pdfIn PDF document text
    • https://cdn.sqhk.co/vafodagusun/hifXJhb/vomufoxiwigob.pdfIn PDF document text
    • https://cdn.sqhk.co/sawibevas/aiifjeE/xawudomoxewaxenuwo.pdfIn PDF document text
    • http://vofidiporalives.22web.org/54111408033.pdfIn PDF document text
    • https://cdn.sqhk.co/dagosasojo/Tvjvhge/14317253894.pdfIn PDF document text
    • https://letunaxure.weebly.com/uploads/1/3/1/3/131383761/c1c66a5fdda9e46.pdfIn PDF document text
    • http://gosologesegob.iblogger.org/kadidavugusasojoga.pdfIn PDF document text
    • https://lawukexudemodu.weebly.com/uploads/1/3/4/0/134041757/nejutorit.pdfIn PDF document text
    • http://jigapenufi.medianewsonline.com/sogaturafuzonoko.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nibopinalilabaj.onlinewebshop.net/nokimakeda.pdfIn PDF document text
    • https://88749095-6fd7-453f-8e8a-15b48fe47dd1.filesusr.com/ugd/e4d7df_ce70790805ff44b6bed0544b2fc19657.pdf?index=trueIn PDF document text
    • https://e1cf253b-b3af-4135-a675-1c3c021177f9.filesusr.com/ugd/111c46_e7cb1b1ad4434664b6fb1dd738ccc48d.pdf?index=trueIn PDF document text
    • http://kitasiru.epizy.com/mouse_toggle_for_android_tv_apk_cracked.pdfIn PDF document text
    • http://kugugoroxe.rf.gd/41968115191.pdfIn PDF document text
    • https://53002a68-e35f-4167-ac88-1ab9777d7e72.filesusr.com/ugd/f5bc2a_ccc427f5ee824292bfa8536d1fd47b0b.pdf?index=trueIn PDF document text
    • http://padegijogul.atwebpages.com/suninulupewelekaxefizoka.pdfIn PDF document text
    • http://jepujaburadobiw.epizy.com/44795146622.pdfIn PDF document text
    • https://e4da1597-3bb3-488b-9226-7c2c9e06e9ce.filesusr.com/ugd/db5d73_eacb649473e9421f8eace39a5e6e72d0.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE765 5220 bytes
SHA-256: 0b81161eeff3048220d9d3e498f4f6230f7d6386048e695b35a3a7c0fe1e61aa
font_01_sfnt_off0000f93f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF93F 10476 bytes
SHA-256: d6f2d56fabe12168b8f61a68b0a81431d59b4397c25fd19e9b0bf1e48b552cbb

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