Malicious PDF — malware analysis report

Static analysis result for SHA-256 9062d499b50a5e1d…

MALICIOUS

PDF

78.2 KB Created: 2021-03-20 23:19:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c87fbb9046d22a166ea31db871bfcf71 SHA-1: cace313ae3a63b8e8ae540f031ec222fc6cc6e87 SHA-256: 9062d499b50a5e1d61d6729f2acc451e02a642931d45400c39b4961eb382cc7a
126 Risk Score

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 0.9958

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://dafemum.ru/wix?keyword=amazon+alexa+apk+download+ios PDF link annotation
    • http://getveran.site/kalesijuremepemamemixufes6uvm1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450256/normal_60070074b42c8.pdfIn PDF document text
    • http://lnstagram-verificationbadgeform.com/262300164617tyex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474456/normal_60023c0ee20b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465136/normal_602b89fbf3dc1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453764/normal_6036267434c2b.pdfIn PDF document text
    • http://priz24.site/star_trek_enterprise_ship_layoutzl2yt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456393/normal_6027db637f352.pdfIn PDF document text
    • http://ru-order-687646765445.art/347084508495yygx.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nowokil/grams_moles_calculations_worksheet_iii.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/218d8538-39e5-4ba7-a304-9ef55b494142/introduction_to_entrepreneurship_exam_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96747873-d9b6-492a-9dec-78891c0c61a6/volume_of_cylinders_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/14823411910.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8dcef96d-0d60-4236-987a-34a3f4848e54/zumolivimonaxafaza.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/tinobopatexikudujetow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1f4803e-c7e8-4c8f-b47d-4f6a480fd154/razor_e200_battery_size.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8255310d-a50d-47c4-b5b3-43672e553a3b/fefoxewe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd5d0aa1-e73e-4c1c-93d4-712b54545710/health_economics_and_outcomes_research_in_india.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/789b8974-811c-47e7-935f-425b8a866426/kuvidikosujupewitap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20bb9168-9c59-4286-8f1b-dfd2e7275280/49801440299.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/how_much_money_do_doordash_drivers_make_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42a7b5d4-214b-44a3-a021-77ca34f5c719/837934248.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a552f230-65f2-43cb-a294-56ffef5ddf71/nonisozekivosi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0408413a-8b2e-4715-9a07-dbdcf72118ba/origami_heart_with_triangle_paper.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d02fea10-4de3-4038-a0e9-a699e6984c98/11552662470.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/awdhesh_premi_new_song_bhojpuri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d934488b-f607-494a-81b9-c7b6fcb14eef/what_should_a_career_summary_include.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd6c9ec8-3951-45a3-9e57-114d48793d00/52251425027.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83e92e51-bdb9-4ed2-8cf4-3511e34d6c0f/10352767853.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_off0000f681.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF681 5272 bytes
SHA-256: 26cae0e976eb520a67ed790d90ee42b5b114f263b41e228a89ebc786b2690f37
font_01_sfnt_off00010879.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10879 10152 bytes
SHA-256: 272ad5cb59537290adb217d45030d19869f0ebf58039101eac9196c515dff783