Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a947092ddec28ec…

MALICIOUS

PDF

75.4 KB Created: 2021-03-15 14:46:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 130ec7c9afab39fe14d20971407e77d4 SHA-1: 122705e0a58736a4a0382547a8d83a4d3a7dbc40 SHA-256: 5a947092ddec28ecc2fe48119fe76daf1e61a09ec2dced1635e40c6671647364
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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://crophysi.ru/award?keyword=ley+anticorrupcion+colombia+pdf PDF link annotation
    • http://terogit.iblogger.org/briggs_and_stratton_vanguard_16_hp_oil_change.pdfIn PDF document text
    • https://rozutawupev.weebly.com/uploads/1/3/2/6/132695629/nabepatu.pdfIn PDF document text
    • http://nubigawe.22web.org/pupuvuwukiwopitorimogawu.pdfIn PDF document text
    • http://drive4mclaneaustell.com/classifying_angles_worksheet_grade_4g7900.pdfIn PDF document text
    • https://cdn.sqhk.co/jirowolad/gffricH/agar._io_hacked_gameplay.pdfIn PDF document text
    • https://sotoxitubomiv.weebly.com/uploads/1/3/2/6/132695919/vodedezanogo.pdfIn PDF document text
    • https://pifelisadejo.weebly.com/uploads/1/3/4/8/134884126/majebokolutubi_didiwo_xigogabobeka.pdfIn PDF document text
    • https://falerelijiwega.weebly.com/uploads/1/3/4/6/134612416/2cbf92c0.pdfIn PDF document text
    • http://lifegirls.site/my_black_and_decker_iron_stopped_workingjnj72.pdfIn PDF document text
    • https://cdn.sqhk.co/kopenanum/aidhcgd/savawulufeminiribofamam.pdfIn PDF document text
    • http://iciapp.xyz/252175440439x5t.pdfIn PDF document text
    • http://mgacessoria.online/92050262002td6xq.pdfIn PDF document text
    • http://itasda.online/bujuxepunopazubowosozfwz33.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/d6be6503-3e41-4f8d-910b-940ae2120a77/pakuvekupijezakisa.pdfIn PDF document text
    • http://vemevusakeke.epizy.com/standard_deviation_bars_google_sheets.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9925ec95-6b0c-4b9c-9b4d-cbe52678169a/foscam_fi9900p_power_supply.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35e243bc-16a2-4398-8f0b-a770e7294e4f/hp_7520_printer.pdfIn PDF document text
    • http://lafeseg.rf.gd/project_manager_round_interview_questions_and_answers_for_.net.pdfIn PDF document text
    • http://bewaxibazo.epizy.com/negation_conjunction_and_disjunction_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/fifomi/backend_jobs_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/36046664633.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_off0000e5fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5FD 5308 bytes
SHA-256: e665ccc8415efec36c74978794e7b610e5c38711344e20f5b52cedd8b7cf25c2
font_01_sfnt_off0000f7f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F9 13180 bytes
SHA-256: e8f610fa2858ae2205be5eff0f8329fda99115572331e3859b194551c2f28f8f

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