Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e62ab335c0f4e95…

MALICIOUS

PDF

90.3 KB Created: 2021-05-06 23:20:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e998c747c270181209253b664ed9feb2 SHA-1: 6b45ee2143990f8c04e8f222bf8395aa0b9088e5 SHA-256: 9e62ab335c0f4e950f625d17064b5e00ef1138df99866634c32977a2208da337
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with one identified as a "PDF link farm" and another pointing to a suspicious URL. ClamAV detection and ML classification strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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://botokaw.ru/strik?utm_term=kiss+the+rain+yiruma+lyrics+deutsch
    • https://cdn.sqhk.co/bijozugetav/aUIibji/mozuweponokafezu.pdf
    • https://cdn.sqhk.co/ranotigu/Dhgibhb/retroarch_switch_gamecube.pdf
    • http://smartline58.ru/jobs_wordpress_templatek5cnk.pdf
    • https://cdn.sqhk.co/pudamunipum/vhgoQja/grade_12_english_study_guide.pdf
    • https://cdn.sqhk.co/xezafube/eqjeghx/minecraft_unblocked_no_download.pdf
    • https://cdn.sqhk.co/javeduner/jbCZhhd/colorado_tower_climbing_jobs.pdf
    • http://chambreop.xyz/88094900033n8cxk.pdf
    • http://espacecmb.xyz/is_garrett_ace_250_waterproofg53c6.pdf
    • http://rentline.pro/6417976266qo6xy.pdf
    • http://bluebadge-support.com/371158819949nwnq.pdf
    • http://yogait.space/zasezepozunepe0wn84.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://f187853a-68e6-4ed6-a420-9593b89d6738.filesusr.com/ugd/27c34a_3846ea6161694510a18cb60313b373de.pdf?index=true
    • https://s3.amazonaws.com/kozibowisenatu/41394651212.pdf
    • https://s3.amazonaws.com/wamatasamegu/9419253865.pdf
    • https://s3.amazonaws.com/bulolimepol/5731129767.pdf
    • https://s3.amazonaws.com/tutapaxi/27297677129.pdf
    • https://13ea8442-998f-4f14-ba3b-7f37e53a414c.filesusr.com/ugd/008a9f_bdebdbb2ec88429faf868e73582444fd.pdf?index=true
    • https://s3.amazonaws.com/kigavanus/business_information_technology_salary_uk.pdf
    • https://s3.amazonaws.com/fizaxo/boletin_informativo_escolar_de_quinto_grado.pdf
    • https://b962d5b8-8819-42e3-9ba3-d95e8366760e.filesusr.com/ugd/f51585_599710c4602e4cbc8d21936d4bcb6d87.pdf?index=true
    • https://s3.amazonaws.com/wazorixekunafob/28264341420.pdf
    • https://s3.amazonaws.com/bevekizadoxuj/movie_sites_for_android_phones.pdf
    • https://48e6b720-b653-4920-beb0-7ef171ab6ab9.filesusr.com/ugd/d9d1f5_79849da981fd4ec3b8b657e45c50ea83.pdf?index=true
    • https://s3.amazonaws.com/zafijukopa/toxazamemasejuxuvipege.pdf
    • https://ab2ac9d4-4772-4872-829d-c19fde0a4f90.filesusr.com/ugd/b919b3_1fc492d7a48345e09d39a02618c0e701.pdf?index=true
    • https://s3.amazonaws.com/tikofaketonub/implosion_never_lose_hope_apk_mod_revdl.pdf
    • 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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000133fb.bin
161bcfee65143123d51be4858012689527aa73a064bdcc59c87fc2011ac27859		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x133FB 22300 bytes
font_00_sfnt_off0000eee0.bin
f373bbaed01e89035377a40aabdf6285015d53c46cdc41f175ae6bd4ab8d9302		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEE0 3136 bytes
font_01_sfnt_off0000fa25.bin
dd3a5c07d5ce87ba146097416b690fa16e5999df655639d1de241c9635734a67		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA25 5248 bytes
font_02_sfnt_off00010bde.bin
7715c7a68796fe07f00f6df3f1edfd16344dc1c08801836ff804bb1d2417d43e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDE 11868 bytes

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