Malicious PDF — malware analysis report

Static analysis result for SHA-256 e95a40947d42b566…

MALICIOUS

PDF

85.0 KB Created: 2021-03-11 13:14:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: f9efbafb21846016f5fd7c36c7397152 SHA-1: 694de700d9c401645c274ab5ab65e5646dd8ef37 SHA-256: e95a40947d42b5664f9c9a58cac1f33266e246faff600822b472a87bc4b63e1b
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, containing numerous external URLs pointing to various domains, some of which are hosted on disposable or suspicious infrastructure. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://dugedepap.ru/award?keyword=attentional+control+scale+derryberry+reed+2020+pdf PDF link annotation
    • https://cdn.sqhk.co/vowobupubuze/ic069gi/yeet_baby_marley.pdfIn PDF document text
    • http://naxuvazexipok.sportsontheweb.net/rabasujezaxenikerapotagim.pdfIn PDF document text
    • https://cdn.sqhk.co/pozazoji/jigjAfC/56955281864.pdfIn PDF document text
    • https://cdn.sqhk.co/wijelukifap/gfjchaH/font_iphone_for_android_no_root.pdfIn PDF document text
    • http://nunovoxiwanafuz.getenjoyment.net/capacitor_code_calculator.pdfIn PDF document text
    • http://knitfqph.site/94477859382sxpqz.pdfIn PDF document text
    • https://cdn.sqhk.co/lofesaxudiwo/yE3idpe/12977671498.pdfIn PDF document text
    • https://cdn.sqhk.co/kunimoxifagi/EhajiiB/17262049716.pdfIn PDF document text
    • http://stebsmeh.space/fipuxoxoke3488o.pdfIn PDF document text
    • https://cdn.sqhk.co/bilexodofose/JjfiilQ/11575534932.pdfIn PDF document text
    • https://cdn.sqhk.co/fipimomozuk/QTXihYh/local_music_player_no_ads_mod_apk.pdfIn PDF document text
    • http://lelekelosutov.getenjoyment.net/misatigelotodejelaxase.pdfIn PDF document text
    • https://cdn.sqhk.co/wobivada/0iaUgiC/mike_v_skateboard_party_2_mod_apk.pdfIn PDF document text
    • http://fusekimutoxi.sportsontheweb.net/learn_to_draw_for_beginners_book.pdfIn PDF document text
    • http://lebepufu.mypressonline.com/91849930991.pdfIn PDF document text
    • https://cdn.sqhk.co/lojibuwe/cijhagN/7429695366.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ca3ec1ac-6ff7-4c8f-ae0f-86a30d86e335.filesusr.com/ugd/3615fb_979aa6e2281a42d29fed7aa83eec90d2.pdf?index=trueIn PDF document text
    • https://1d942ef5-affb-47d8-8f99-70a3d187b733.filesusr.com/ugd/3283b0_6aa56db2d2324774b0aa2c074d7cb39f.pdf?index=trueIn PDF document text
    • http://lexamokoxerum.atwebpages.com/jomafatip.pdfIn PDF document text
    • http://xowilewegiwo.myartsonline.com/oedipus_rex_character_analysis_essay.pdfIn PDF document text
    • https://e50eee24-2d95-422d-8083-6f618d95927b.filesusr.com/ugd/594ae5_e05b38dcf77b4cb39fe505b08f0a6532.pdf?index=trueIn PDF document text
    • http://kepawomokatuke.myartsonline.com/96591802714.pdfIn PDF document text
    • https://8c1dc56a-a131-4b43-acff-3635b9115217.filesusr.com/ugd/90423f_46d529493dbd49648cc39dca2373760d.pdf?index=trueIn PDF document text
    • https://e942959e-95af-4115-ab05-a6e38533eaad.filesusr.com/ugd/66f7a0_a1778d9d618749d899cb81252620aa3e.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_off0001100f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1100F 5656 bytes
SHA-256: 93bd9e8de71e512fe85171ee1d03b25538a9e867d6284fa0cd678c211a409252
font_01_sfnt_off00012364.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12364 10168 bytes
SHA-256: 1adac975f24a3e521dade3bb2462b9726acf62dec1ff1d3a6d28436643863adb