Malicious PDF — malware analysis report

Static analysis result for SHA-256 95f6d220d6e3541d…

MALICIOUS

PDF

82.6 KB Created: 2021-06-04 12:38:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 65a68cdcbbcf2578539496084ecf14c0 SHA-1: d2ae9e37729797ff0c37f3cf94bb8ddc823906f2 SHA-256: 95f6d220d6e3541d1bdce3b09f1beec51f45b72bff424a4d3656d995ae7d902e
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical finding for a 'PDF_SEO_LINK_FARM' and ClamAV detection as 'Pdf.Phishing.Trojan'. The document contains a large number of external links, with one prominent URL being 'https://crewmak.ru/pbw?utm_term=how+to+get+skyblock+on+minecraft+pe+ios'. While no scripts were explicitly extracted, the presence of numerous external links and the phishing/trojan detection strongly suggest a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://crewmak.ru/pbw?utm_term=how+to+get+skyblock+on+minecraft+pe+ios
    • https://cdn-cms.f-static.net/uploads/4376870/normal_60270eedc1cd2.pdf
    • https://cdn-cms.f-static.net/uploads/4412413/normal_5fd6c5b3ac44d.pdf
    • https://didaripetog.weebly.com/uploads/1/3/4/6/134685212/sakosewolimawixel.pdf
    • https://cdn-cms.f-static.net/uploads/4390366/normal_5fda30a753304.pdf
    • https://static.s123-cdn-static.com/uploads/4470521/normal_5fec0b2c3a02a.pdf
    • https://static.s123-cdn-static.com/uploads/4457586/normal_5fcd9eee34a35.pdf
    • https://rivelipa.weebly.com/uploads/1/3/5/3/135349188/rejerolosuw_rogan.pdf
    • https://dogopakuva.weebly.com/uploads/1/3/4/6/134698139/repawazavuxuzip-tesepufofonu-popoponega.pdf
    • https://cdn-cms.f-static.net/uploads/4464734/normal_604f3772d4de1.pdf
    • https://cdn-cms.f-static.net/uploads/4454426/normal_604a21ec7a872.pdf
    • https://static.s123-cdn-static-d.com/uploads/4469370/normal_60b63a29d1cbc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wigonewakil.pbworks.com/f/there_is_there_are_questions_and_short_answers_exercises.pdf
    • https://uploads.strikinglycdn.com/files/95abea73-b991-4fc0-93cc-5bb7a0281646/63338036684.pdf
    • https://uploads.strikinglycdn.com/files/a11eeae2-cb32-47f0-acd5-7593b794af76/yamaha_rx_v471_bluetooth.pdf
    • http://kunixove.pbworks.com/f/74552447008.pdf
    • http://pokuwatosat.pbworks.com/w/file/fetch/144454812/44646273527.pdf
    • http://tazijebep.pbworks.com/f/cu-aat_practice_test.pdf
    • http://vawaguzidatu.pbworks.com/w/file/fetch/144424539/10552595416.pdf
    • https://uploads.strikinglycdn.com/files/773a9d46-d40b-4b20-9016-511c74218e01/barbie_dreamhouse_adventures_game_vip_unlock.pdf
    • http://kufogokoges.pbworks.com/f/oxford_companion_to_wine_4th_edition.pdf
    • http://zolunegoli.pbworks.com/w/file/fetch/144559740/wilugogadanezo.pdf
    • http://jolowajuwijo.pbworks.com/f/lerudala.pdf
    • https://uploads.strikinglycdn.com/files/c9777398-9576-4473-a79f-6a65f9d717af/multiplying_decimals_by_whole_numbers_worksheet.pdf
    • http://bezawagiga.pbworks.com/w/file/fetch/144535827/pabekowowoded.pdf
    • https://uploads.strikinglycdn.com/files/4c4eb8ea-f991-448d-a7c5-5f8c7ddb3d5c/valentine_one_v1_radar_detector_rear_view_mirror_mount.pdf
    • http://gabumur.pbworks.com/f/comptia_security_study_guide_exam_sy0-501_download.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000104f1.bin
fad114aba0748b26d897e567f8fef659794f4aa6e47d0afcb2bbe1cbfa68d14f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104F1 5692 bytes
font_01_sfnt_off00011860.bin
60e18891ac1fd8139f55b6e586115c5d1d66a5ae540135d4ddaa4b9537230df1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11860 10588 bytes

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