Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1c7065da2fe7802…

MALICIOUS

PDF

75.2 KB Created: 2021-03-30 20:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ca63335f90bfdc3f5c1062c685ed86e1 SHA-1: 717c91cf5689ab62f64b0777ac8baeb83cce74af SHA-256: b1c7065da2fe78027483d0db91ad78c625bb84721bd60e9b53ccbf382b3ce466
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://midufefew.ru/strik?utm_term=which+bible+is+the+best+version PDF link annotation
    • http://gejedesoni.getenjoyment.net/ncert_accountancy_solutions_class_11.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a1d1c4ac-cf1d-4c58-861c-45d1188f4b60.filesusr.com/ugd/052f3a_8200407443f14c4b89a5c90e473aa31e.pdf?index=trueIn PDF document text
    • http://pejebitopaw.rf.gd/nessun_dorma_sheet_music_chords.pdfIn PDF document text
    • http://veboluzamusi.epizy.com/how_to_take_lint_trap_out_of_ge_dryer.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/losugifagufev.pdfIn PDF document text
    • https://e6b56e3c-1b88-4cfb-972d-ab1702b0a06e.filesusr.com/ugd/8c0e65_74b430748b974b48b094cd9108ac9121.pdf?index=trueIn PDF document text
    • http://vulevusevugola.epizy.com/bncc_atualizada_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d91c083-3ebc-4264-8b6f-9867ac2d5bf2/2000_chevy_s10_ignition_wiring_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/zexozavo/are_trimmer_attachments_universal.pdfIn PDF document text
    • http://fuvuvadut.onlinewebshop.net/18758567794.pdfIn PDF document text
    • https://992bddda-184d-467f-a815-0165b41a2208.filesusr.com/ugd/69695d_cd3a84c67aed46dbb1a5052be0f52c4d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fedure/android_4._2._2_aosp_rom.pdfIn PDF document text
    • https://8fc1c2d6-49ba-4d63-8b95-0327ef2b1627.filesusr.com/ugd/1849a1_f51084a699d246b3b2ad7ef07c5685a6.pdf?index=trueIn PDF document text
    • https://2703069b-a6ff-4ff9-983c-db139a8d76ba.filesusr.com/ugd/8b61cf_209b213e0a2c4d188fb6fdaa85ac1ee5.pdf?index=trueIn PDF document text
    • https://5405d108-7f1e-482b-a10c-e06f62b7505d.filesusr.com/ugd/d941b1_862dd53a61ad4c068d54655e2b264269.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe3e9029-df82-4599-a5e8-bfc4cc562ac5/how_much_do_data_scientist_earn_in_nigeria.pdfIn PDF document text
    • https://70848fb0-0fd0-490a-9360-2ffa38fc212c.filesusr.com/ugd/08e331_ac70615bd9b748c88972ad2dd015ab45.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/seriposuj/96625203821.pdfIn PDF document text
    • http://gumikibe.rf.gd/bexekebizuk.pdfIn PDF document text
    • http://betakudo.atwebpages.com/calibre_guide.pdfIn PDF document text
    • http://nakeviw.myartsonline.com/ardhanarishwara_stotram_in_telugu_free_download.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BD 4888 bytes
SHA-256: 0f9d7086e029b1cae089a71a8a5a681445ca43f9cad0fcd21489fcdedf8fb007
font_01_sfnt_off0000f96f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96F 11192 bytes
SHA-256: 15fe00377e48d5c962390188dea3057f64ad10fc6dc8804f7c75affade120a1e

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