Malicious PDF — malware analysis report

Static analysis result for SHA-256 5704edecf436b789…

MALICIOUS

PDF

96.4 KB Created: 2021-03-27 15:21:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 9097124034f163dad8d2025b90a41c6c SHA-1: 10283179f4bb702a90125c7045faee43d2fd3707 SHA-256: 5704edecf436b789c7fe0fac0f71cc602ae63100f76ee544fb53cb560df8061c
156 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 a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://bologen.ru/123?utm_term=anybooks+mod+apk PDF link annotation
    • http://freehookup.xyz/54126072413vzea6.pdfIn PDF document text
    • http://hdsamara.ru/vapour_absorption_air_conditioning_system4u6k7.pdfIn PDF document text
    • http://6gusevshop.website/active_listening_2_student_s_booky2zk3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/aafdebda-66ce-47a2-bfc7-39a686fdbf41/going_postal_terry_pratchett_movie.pdfIn PDF document text
    • http://sogefotatuledis.epizy.com/84859782727.pdfIn PDF document text
    • http://negeguragifijem.rf.gd/29210292872.pdfIn PDF document text
    • https://s3.amazonaws.com/xijilesuzuxo/bombay_dyeing_bed_sheet_online_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/56864462689.pdfIn PDF document text
    • https://s3.amazonaws.com/bikikanafopavu/94419184790.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/hangeul_master_ebook.pdfIn PDF document text
    • http://zifiwetoma.epizy.com/kagugariwubibeje.pdfIn PDF document text
    • https://510adc33-753b-44c0-977e-8d34da8fcdd4.filesusr.com/ugd/5f4192_48b6a4272ce84a43bb51064dd216cd89.pdf?index=trueIn PDF document text
    • http://jokipuzovorije.epizy.com/6695436936.pdfIn PDF document text
    • https://s3.amazonaws.com/luropiw/sikepakogimofuwowekonowe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74a36856-1b7b-452f-a32a-fc4c5fdaa8fc/xazataze.pdfIn PDF document text
    • https://s3.amazonaws.com/donukadizolin/excellence_resorts_reviews_playa_mujeres.pdfIn PDF document text
    • https://f89b8795-a90f-4359-81e0-6309601a98d9.filesusr.com/ugd/8e7730_429b7f7f84094ae399b2b85f129e9249.pdf?index=trueIn PDF document text
    • https://3ae4d138-4ba3-4962-98fb-1b98b40a6a82.filesusr.com/ugd/38062a_2a94fb459b3f4e1fbc85e312b4248558.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/besafefaf/bootswatch_free_templates.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fdd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDD3 3084 bytes
SHA-256: 30d7c1ca9eccfb05018a10c608771b6688fd54256498577a8ee5620c7fa55ebb
font_01_sfnt_off000108f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108F0 4812 bytes
SHA-256: 5c8ff6b4aaa9a2ded3293babe486b311a458df17db1fb66ff7eb2f96c4c06000
font_02_sfnt_off00011917.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11917 3168 bytes
SHA-256: f52b1eb4116d122b9339d47236fc2dea60bdc915573559cef549ce0eff573dbb
font_03_sfnt_off0001257d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1257D 11884 bytes
SHA-256: af042ecca5227eff65fd92500e6b48d9597b7c9b76321c2c41f74217ee791af5
font_04_sfnt_off00014e2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E2F 16304 bytes
SHA-256: 36298d9b42482ef505b651e9545134b76438dad7e59d1f17d96a2cc3761d4b83
font_05_sfnt_off000163a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x163A6 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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