Malicious PDF — malware analysis report

Static analysis result for SHA-256 cac3b2d6c9aaff4b…

MALICIOUS

PDF

77.2 KB Created: 2021-03-14 06:00:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: a81288112dd3e7f33af783cdc6b0aa61 SHA-1: 9e1f5e5856669bfdcb25d53d1f00efd569fd3e1b SHA-256: cac3b2d6c9aaff4bb335f8a5636cdbae88a85f53d1136828ae323afdb42bd0c7
156 Risk Score

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://fokemale.ru/award?keyword=cat+devant+un+arret+cardiaque+pdf PDF link annotation
    • https://xojemejavema.weebly.com/uploads/1/3/3/9/133987363/tozenudosuf.pdfIn PDF document text
    • http://wovogabaposexe.22web.org/how_to_sharpen_your_business_writing_skills.pdfIn PDF document text
    • http://vedatolinofiz.iblogger.org/filmic_pro_6._4._2_apk_cracked.pdfIn PDF document text
    • https://dudasajaje.weebly.com/uploads/1/3/4/3/134362454/zekapaj.pdfIn PDF document text
    • http://levantemosaic.com/parts_of_a_paragraph_worksheet_grade_340rte.pdfIn PDF document text
    • https://tonituligavu.weebly.com/uploads/1/3/4/8/134884188/baa580.pdfIn PDF document text
    • http://trokot-new.online/jetesufifadoteduh75nr.pdfIn PDF document text
    • http://malespw.xyz/how_to_change_dmv_appointmentcxusj.pdfIn PDF document text
    • http://mon-compte-cmb.best/television_interview_script_formatwj6b0.pdfIn PDF document text
    • https://wozuxepu.weebly.com/uploads/1/3/4/4/134478893/letobal_ronexetifa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://601bead5-a720-4f65-98db-62fe2a42cb91.filesusr.com/ugd/0e52b4_a2c1f6c813a14c849d4e0813e40449ad.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/backtrackit_for_pc_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/ias_12_questions_and_answers.pdfIn PDF document text
    • http://bavipilebevim.epizy.com/hp_laserjet_p1006_driver_free_download_for_windows_7.pdfIn PDF document text
    • https://1e16f6d7-285b-4488-bf07-d3e24ac90e20.filesusr.com/ugd/417718_3d7bfa8b8f69462aaea45665c9dde25e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nigimul/texas_instruments_ba_ii_plus_professional_target.pdfIn PDF document text
    • https://s3.amazonaws.com/gedesisumi/71053010912.pdfIn PDF document text
    • https://86042ffc-9b62-460b-8552-fb2522205a17.filesusr.com/ugd/4f92c1_b2ac48db22a148f78dc3ed6015b8d627.pdf?index=trueIn PDF document text
    • https://21a67f6d-2aea-439f-a910-ed4feb6be009.filesusr.com/ugd/173616_5477a9dc78dd4d4aa8e632f40dd2db75.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ropuba/luis_borges_poemas.pdfIn PDF document text
    • https://s3.amazonaws.com/kopisigapub/ap_calculus_bc_2018_practice_exam.pdfIn PDF document text
    • http://kofezinidabefu.epizy.com/foxobarupizolatuzopolami.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/ba_pass_2013_full_movie_300mb.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_off0000eda1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA1 5028 bytes
SHA-256: 53ccd4ee40985e4097f7a89a4ffacc6c2e24619bac7dfbe4bb07c90481a82f31
font_01_sfnt_off0000fed4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED4 12036 bytes
SHA-256: 7f757c2800e4a81d8ad867956ccbb3929f2d6136b83cffd33de666719c795188

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