Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e8970634af7674d…

MALICIOUS

PDF

79.8 KB Created: 2021-03-14 12:35:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5a384ddf1a39e648585dba1513c699bf SHA-1: 7056a3943ac5033b013ded052f1f2a2a7da125b3 SHA-256: 7e8970634af7674db6612c06f477f27ca306c7408ed8f30f2727c43724c66d77
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a significant number pointing to a link farm, indicating a spam or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The embedded URLs, particularly 'https://resalured.ru/award?keyword=atomic+punk+tab+pdf' and 'http://limons.space/zejixisaxiwomenyoqdb.pdf', are likely used to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://resalured.ru/award?keyword=atomic+punk+tab+pdf
    • http://limons.space/zejixisaxiwomenyoqdb.pdf
    • http://rmk4sale.xyz/armored_car_hd_racing_game_apk_downloadd2kze.pdf
    • http://paguwob.22web.org/what_a_beautiful_name_chords_guitar.pdf
    • http://tesevamomavuruf.22web.org/ccna_module_1.pdf
    • http://vigastlens.xyz/8462248030430yxt.pdf
    • http://reactivaperu-viabcpi.com/pimaturukavulaju00bc9.pdf
    • http://vitrinachel.ru/9301310684mak3j.pdf
    • http://rabusog.22web.org/atls_american_college_of_surgeons.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://e8dc5420-792a-4861-90db-09cfc8d8a7d1.filesusr.com/ugd/1378f5_ff293e160cb24b27a47d47b733c12ae3.pdf?index=true
    • http://musowafotoxipid.epizy.com/c1_differentiation_worksheet_c_answers.pdf
    • http://mibobugaf.rf.gd/how_to_terminate_a_month_to_month_lease_in_georgia.pdf
    • https://uploads.strikinglycdn.com/files/c20c2016-4796-4e6e-aca8-7cefb3ab193c/89089480248.pdf
    • https://uploads.strikinglycdn.com/files/4dd9e57a-f4eb-4de1-8be4-faad17bcabf4/15993423346.pdf
    • https://uploads.strikinglycdn.com/files/6ab963aa-eac6-4348-bf21-90a85a2cd86b/sawikafu.pdf
    • https://6a9ecc2b-05c3-4056-8705-773ae6be8cdd.filesusr.com/ugd/7a359d_7c16550467844e6b854a87ccc897c059.pdf?index=true
    • https://uploads.strikinglycdn.com/files/3c0f3b5e-4faa-4f1a-bb6d-62ab0aa3f6d8/jigosokifejevuxede.pdf
    • https://uploads.strikinglycdn.com/files/97c30663-37ac-4e2e-bd9c-193aff4bbd14/39318560140.pdf
    • https://36071b1a-d853-4ad1-bccf-0ed894d94038.filesusr.com/ugd/906e9f_a172b5f1025641b0977c70209190b524.pdf?index=true
    • https://d4180a97-8dd0-4bf1-9e2f-d1b128d1a64d.filesusr.com/ugd/ae059d_9bad6e6ad91d433d8c64a04f8de8907e.pdf?index=true
    • https://uploads.strikinglycdn.com/files/cf283ca8-67dd-4a95-92b0-90fefd87241e/19321196672.pdf
    • http://bosirizowu.rf.gd/dixafipekamize.pdf
    • https://uploads.strikinglycdn.com/files/648ab501-4d12-4974-b09d-b2eda53fc420/texto_argumentativo_caracteristicas_y_estructura.pdf
    • https://uploads.strikinglycdn.com/files/ab7e745f-a965-4bd1-baf7-f438690d0b14/64372193034.pdf
    • https://1482387f-61d8-47e1-b538-9b7f1e8b89fb.filesusr.com/ugd/538d67_ab02b5ea7d7b4d3583c11b16743f8c89.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_off0000fbdd.bin
1d01ca94e046dd6e3aacd433cc767d2c58dd122c00f29c1c19cedbd788aca44c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDD 5188 bytes
font_01_sfnt_off00010d7c.bin
9f11c15da4393755ceb2db6cabed7645e00508f5f7bd8210a32d8875216025fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D7C 10312 bytes

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