Malicious PDF — malware analysis report

Static analysis result for SHA-256 bafc15114a8af9a2…

MALICIOUS

PDF

77.7 KB Created: 2021-05-03 09:49:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 110ef847f1ad7c6c1370fefb55c5f7f0 SHA-1: df9431087ef9de4d3f91110d9d714e5bce0436f4 SHA-256: bafc15114a8af9a2ce0e7439779e751f31dfe9eec47bf1341d588de37bc1ad3b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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 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://resalured.ru/strik?utm_term=free+christmas+math+worksheets+for+preschool PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4458838/normal_5fd61a19480df.pdfIn PDF document text
    • https://kulufitobapesad.weebly.com/uploads/1/3/4/4/134443603/bevisizamides-fuzekikiresido.pdfIn PDF document text
    • https://sikufotoxatufik.weebly.com/uploads/1/3/4/4/134458503/5400443.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403952/normal_603b501d2d537.pdfIn PDF document text
    • http://ladukusuga.22web.org/music_notation_guide.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xizufelelariru.rf.gd/write_a_two_paragraph_essay_describing_the_aeta_depicted_in_the_photo.pdfIn PDF document text
    • https://s3.amazonaws.com/zebarufuridorur/how_to_thread_singer_serger_14t968dc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1e23b46-2554-45ad-af81-720f5f3b59c3/verbos_regulares_en_ingles_concepto_y_ejemplos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae443a1b-e072-46b8-801e-0eb0a510daf4/bitezosogotiro.pdfIn PDF document text
    • https://s3.amazonaws.com/waxegatulo/ffxv_bahamut_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/magic_treehouse_books_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gazivemon/android_9_pie_features_samsung.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5f29ad4-d6c8-4f67-bb08-5cd2d91d438e/how_to_find_spin_wave_function.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7540090-f82f-439e-a396-82724cbcfe64/how_to_do_solid_writing_on_cricut.pdfIn PDF document text
    • https://s3.amazonaws.com/vososasoxumete/wedding_anniversary_cards_psd_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/dremel_4000_rotary_tool__4_attachments.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/singer_4423_review_amazon.pdfIn PDF document text
    • http://sejekowosabukog.epizy.com/noriwiwomuzixowowi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb7c28be-6935-43ae-8ef2-85e2cd44a2b7/pak_studies_notes_in_urdu_for_class_10.pdfIn PDF document text
    • https://s3.amazonaws.com/piwupevivotixi/apc_smart_ups_1500_battery_replacement_part_number.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_off0000f2dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DC 5364 bytes
SHA-256: eaa50da9d6787bd785abc8ca2ae3b34749b36c1c8d52cb2bea181bc086eda18c
font_01_sfnt_off0001050a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1050A 10652 bytes
SHA-256: 82da0e0758de95979d842ea8240daa0bd6daf179292bb02f1c364609235c6722

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