Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebc8de130f35b7c6…

MALICIOUS

PDF

77.6 KB Created: 2021-03-18 02:38:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6acd833b7064390ea645684d5b43b988 SHA-1: b04c0d533124398c774480ae138f428c0e302279 SHA-256: ebc8de130f35b7c67efc5aba4222fa6c1d327d6b4f08ed14088bda3c22dfef26
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are dynamically generated and likely part of a link farm for SEO manipulation. One of the primary external URIs, 'https://resalured.ru/wix?keyword=the+amazing+spider+man+3+apk+mod', suggests a lure related to popular media to disguise malicious intent. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wix?keyword=the+amazing+spider+man+3+apk+mod
    • http://kawlites.online/fodojefofurinetuporep4nfz.pdf
    • http://selectgetc.top/salezimakirosebarozovonolbssan.pdf
    • http://totepopewag.iblogger.org/counterparty_credit_risk_eduardo_canabarro.pdf
    • http://vuwazakuzasoz.iblogger.org/will_we_see_shooting_stars_tonight.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/d5542e53-fedb-4b09-a236-7bdc11c8db19/81809336807.pdf
    • https://uploads.strikinglycdn.com/files/1d9dd8a1-0877-4873-b3f8-071313f1f520/star_trek_voyager_threshold_non_canon.pdf
    • http://selifesupenikiv.epizy.com/spooks_breeches_size_guide.pdf
    • https://uploads.strikinglycdn.com/files/4c7442ef-6d30-440d-87a9-9d72c4d90d4a/83105871401.pdf
    • http://witegev.epizy.com/24226929938.pdf
    • https://s3.amazonaws.com/jeduzizonox/pixesesoxaxuwazu.pdf
    • https://1138278f-e8d0-45ef-aef3-dbdd7428ac52.filesusr.com/ugd/5be868_e8a28f17e86b4ff4bb07289b9b6dd7f8.pdf?index=true
    • https://uploads.strikinglycdn.com/files/81961166-c531-4008-9b22-ff9f5fbafd98/historia_de_mexico_2_telebachillerato.pdf
    • https://s3.amazonaws.com/paxivogedewilu/90460222458.pdf
    • https://5efcf519-4c71-4be9-a00f-e1d47ba804c5.filesusr.com/ugd/ebcc4b_f6b4496d61aa4b868ae7ecee431c0dc7.pdf?index=true
    • https://uploads.strikinglycdn.com/files/303020bf-875b-4604-a8b1-337b6e61192b/jbl_xtreme_2_speaker_-_black_jblxtreme2blkam.pdf
    • http://nigepitabatutap.rf.gd/wisiravimiwelujoj.pdf
    • https://uploads.strikinglycdn.com/files/48069138-10d5-42dd-989a-692d60bfbf3b/how_to_get_rid_of_the_student_version_of_autocad.pdf
    • https://uploads.strikinglycdn.com/files/e0c4cc71-c461-4b7b-b748-95a41ce4a63d/mutopunesupufadud.pdf
    • https://de7eff9d-5c50-4122-bb99-ee112abf7a8f.filesusr.com/ugd/db8f21_f3dacc8c1e1d4f5099bca9d29bd7e190.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e595.bin
7187e0a8c4ee22b90b39e98ee751577aff4aadc897e6d49c8ce93b29a3287c4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE595 5276 bytes
font_01_sfnt_off0000f75a.bin
060ca69d7f4ca8a9a73f50207a6c310cde346072ac9e213e91a64bd7bdeb5247		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF75A 10496 bytes
font_02_sfnt_off00011b4a.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B4A 4324 bytes

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