Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2be317ea84668e9…

MALICIOUS

PDF

79.1 KB Created: 2021-03-18 23:03:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f4c7d28517774ad08855ef113fa784cc SHA-1: 70f24b6b9093f56d0f535683f78ba3780f4cf6d4 SHA-256: a2be317ea84668e9404b5962aba7307a2b5e75faa38c4ff7f60a8522b2d6bef1
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 0.9998

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://soxebez.ru/123?utm_term=ng%25E1%25BB%2599+%25C4%2591%25E1%25BB%2599c+chloroform PDF link annotation
    • https://cdn.sqhk.co/wesebewoweva/ihgf7AP/67587415037.pdfIn PDF document text
    • http://zizubur.22web.org/zawejowigezured.pdfIn PDF document text
    • https://cdn.sqhk.co/jarogofef/iggChew/budigoj.pdfIn PDF document text
    • http://takodevizol.iblogger.org/barracuda_spam_virus_firewall_400_datasheet.pdfIn PDF document text
    • http://rumagadoli.22web.org/vofuf.pdfIn PDF document text
    • https://cdn.sqhk.co/mavozopofug/eChijbx/motorcycle_license_ny_cost.pdfIn PDF document text
    • http://sk-anker.ru/dibotodawosalustj5re.pdfIn PDF document text
    • https://cdn.sqhk.co/zururodi/kphjNhg/90990723211.pdfIn PDF document text
    • http://okstore.info/cancer_del_colon5mpvw.pdfIn PDF document text
    • https://cdn.sqhk.co/wetilusogaki/jayLhc8/porabev.pdfIn PDF document text
    • http://newberginvestmentproperty.com/the_girl_with_the_dragon_tattoo_2009_moviebxy87.pdfIn PDF document text
    • http://theharaka.online/mims_drug_handbook_2018_free_downloadpe0ef.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/678cd35d-b0f0-42e0-8d96-e8ec71abe4dd/best_buy_computer_repair_fees.pdfIn PDF document text
    • http://jenetowagipose.rf.gd/ielts_writing_task_2_question_types.pdfIn PDF document text
    • http://vipesuno.rf.gd/getagu.pdfIn PDF document text
    • http://wirodugapilab.epizy.com/call_of_duty_ps4_to_ps5.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/980e0c98-786a-44f4-88b2-989bddd5b539/how_to_do_scientific_notation_on_ti_34_multiview.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adfc4d40-60e3-46af-8e9a-1f311de9cc7c/50155662237.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fc8183c-098d-473f-a04e-6ece93e7e0b4/easy_touch_lancing_device_lancets.pdfIn PDF document text
    • http://sikejafomanama.epizy.com/lunakuliwurepal.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_off0000e81e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE81E 5192 bytes
SHA-256: c7f4d36632362bbd9f7b6032dfcce787498dfe282b160210b964dc092cf15d88
font_01_sfnt_off0000f975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF975 24080 bytes
SHA-256: 985e75150d8ced9777bd231797f3c4466f012eecdfcaf7b4828a40931dec6ad3

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