Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c4a79a6fadabf39…

MALICIOUS

PDF

81.6 KB Created: 2021-05-26 05:48:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: b5b432ce0ea4228d1290d084ddf44f40 SHA-1: 2a2e1073026d6e8a718563f19ed251c142a6b694 SHA-256: 2c4a79a6fadabf39d920e6fd753187f76d3ae7bac6daafb71db88f4cbf0a783d
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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/strik?utm_term=if+conditional+sentences+type+1+exercises PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4487382/normal_603220f70abf9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377931/normal_601372bfdc2c9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381988/normal_5fcf5e475427b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446275/normal_6034508144b8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380082/normal_603a91e827203.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450628/normal_602e2fae512cb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/94f0bbcf-6345-417a-aeab-07033e9cb301/simonazezobesigivivusod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecb34510-2c74-4311-8eaf-0c9e37af2b7e/lemony_snicket_who_could_that_be_at_this_hour_audiobook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c3f78b6-3935-44aa-880b-0ba8635d304d/how_to_make_a_motion_activated_light.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf4a2048-2362-4619-8588-6676a247a885/what_only_makes_you_stronger_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69a9e944-a931-4fda-b830-e90c2d9b2847/48524424440.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca2f9495-f882-4c52-8d20-847bc9194131/dutowusofararagunoji.pdfIn PDF document text
    • https://s3.amazonaws.com/tanikanaw/tesive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4ddf89a-1746-43b8-96be-49534d77f22e/othello_act_1_jealousy_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c49fcbdd-3f8d-4c34-b4fe-fd28a6821ef7/mi_smart_band_4_istruzioni_italiano.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/nenowamivuguxe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1491923a-d5cc-4c15-b3f2-f7b75381999c/full_body_workout_for_flexibility.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42d07b50-a56e-4793-92cf-b18d50bb8790/the_story_of_bluebeard_by_charles_perrault.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/262b429c-59cc-4e9e-97ad-f53ff05440d8/70074216764.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/mystatlab_statistics_quiz_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/how_to_fix_a_bunn_coffee_maker_that_leaks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc14a4fa-8a1a-436b-a470-42245fe7ded0/vasekinuduxibevew.pdfIn 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC75 5308 bytes
SHA-256: 8f5a9284ca28391d517690d484f991da8fe0e98496db85672bc614ee770b551c
font_01_sfnt_off0000fea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA9 10532 bytes
SHA-256: 529d6b9bb04f192198f6637bbff02abf4509995c3004082ea1a50de27e49cf31
font_02_sfnt_off00012310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12310 16204 bytes
SHA-256: c988415812f594187b0a0ed75dc52802e798e1695b49bd300f8412a65040a449

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