Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b7ca7d528254a79…

MALICIOUS

PDF

75.9 KB Created: 2021-04-17 09:09:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5127550213b9b000245533b19c418614 SHA-1: 7d8d94022b8a1ae2b0c8a8dca358736b3a4d1349 SHA-256: 6b7ca7d528254a79f5beb00645fcb08d4649b9fbf99d8b7939ebfadcfeb92130
156 Risk Score

Malware Insights

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

The PDF contains a link farm designed to appear as search results, specifically mentioning 'Troy bilt lawn mower blades near me' to attract users. It embeds numerous external links, with a critical heuristic identifying it as a PDF link farm. ClamAV detected it as Pdf.Phishing.Trojan, and an ML classifier also flagged it as malicious, indicating a phishing or trojan distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jumiwimov.ru/strik?utm_term=troy+bilt+lawn+mower+blades+near+me
    • http://magazok.top/lomeneviv4b08.pdf
    • http://jelojutu.sportsontheweb.net/zutojewixozavi.pdf
    • https://cdn-cms.f-static.net/uploads/4467017/normal_5fd7cbac838fd.pdf
    • https://cdn-cms.f-static.net/uploads/4454426/normal_600be5ebb7131.pdf
    • http://idealicaitalia-ufficiale.site/is_nesquik_strawberry_milk_good_for_youtoi8e.pdf
    • http://kvyovk.xyz/2012_toyota_highlander_limited_consumer_reviewsklexz.pdf
    • http://lipenav.mypressonline.com/porque_el_amor_de_mi_alma_solito_me_dejo_letra.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://0793e221-2e7e-4176-aae8-4ff4b75d8f7a.filesusr.com/ugd/64bd79_a5bc4c785b0948dc90d92dfa3dbe51be.pdf?index=true
    • https://s3.amazonaws.com/gotijejaj/annabelle_creation_movie_in_tamil_free.pdf
    • https://s3.amazonaws.com/woberiz/sazesuvijumaworatumul.pdf
    • https://s3.amazonaws.com/jojitagifuva/manpower_planning_excel_template.pdf
    • https://s3.amazonaws.com/tarajix/tibifalat.pdf
    • https://s3.amazonaws.com/degisapemifa/49582902763.pdf
    • https://s3.amazonaws.com/tojabixefova/wisowiduloxejozuwe.pdf
    • https://198d5876-2e36-4a54-a59d-b4c1060b65be.filesusr.com/ugd/4733ca_9d650faaa34a4e2f871c099cfc2ad0dc.pdf?index=true
    • https://s3.amazonaws.com/zozuxukoxo/chennai_express_full_movie_filmywap_hd.pdf
    • https://s3.amazonaws.com/genijusemu/good_conundrums_with_answers.pdf
    • https://s3.amazonaws.com/xidazeze/kasoxikalisufupogojo.pdf
    • http://futakanawus.onlinewebshop.net/12154535501.pdf
    • https://c4bedd8b-a3e9-4aa8-9751-a6fde4035b7e.filesusr.com/ugd/037f08_b0d2cb1abbfa4ad29e441cb48867ad69.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebc0.bin
65a088d99836e2017acc8fb92af1352944f91c927f934d66d2262a8b41873412		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC0 5252 bytes
font_01_sfnt_off0000fd9a.bin
28055c2abbf151625dc1ad13de032739024cce93fdbbf4a547d361676b3ea0de		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD9A 11012 bytes

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