Malicious PDF — malware analysis report

Static analysis result for SHA-256 93022fb73d11f1c6…

MALICIOUS

PDF

92.7 KB Created: 2021-04-08 17:49:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ee5dc83a9f963722bfad9329903a0f12 SHA-1: 8ee7b5bcbe8c7f7267a8e41f9f69abdd0786a48b SHA-256: 93022fb73d11f1c65e3fc2293623780643491e11c4af154d62cca878d76beda0
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 0.9998

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://bologen.ru/strik?utm_term=starbucks+corporate+identity+manual+pdf PDF link annotation
    • https://simisidexibasu.weebly.com/uploads/1/3/4/5/134502995/d7da2220e4fa11d.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/h6ajdDu/emoji_black_movie_titles_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/xorunase/2QNgizp/super_dancer_chapter_1_winner_and_runner_up.pdfIn PDF document text
    • http://babbieshop.ru/digestion_y_absorcion_de_lipidosnpn5r.pdfIn PDF document text
    • http://potolkilife.ru/napejokuduponugipe8c5ve.pdfIn PDF document text
    • https://podinelejuwe.weebly.com/uploads/1/3/2/7/132710627/5820521.pdfIn PDF document text
    • http://linza.media/zifivarizegolozasekulewu1ao.pdfIn PDF document text
    • https://nopovufarake.weebly.com/uploads/1/3/1/3/131379277/lejagugesug.pdfIn PDF document text
    • http://mmmuuuue.space/gilotth64c.pdfIn PDF document text
    • https://tojuxumisadef.weebly.com/uploads/1/3/4/7/134714483/504072430f4.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/lulelepese/zebuxijekeju.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/how_to_respond_to_special_interrogatories.pdfIn PDF document text
    • https://s3.amazonaws.com/gitipelut/pronouncement_of_death_form.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/jcb_3dx_backhoe_loader.pdfIn PDF document text
    • https://s3.amazonaws.com/kexamoxusinixu/apa_style_case_study_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wusone/64553185425.pdfIn PDF document text
    • https://s3.amazonaws.com/furunumaroxun/realtek_high_definition_audio_driver_for_windows_7_64_bit_acer.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/playstation_gold_wireless_headset_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/how_to_use_technical_analysis_for_intraday_trading.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_off00012b24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B24 5712 bytes
SHA-256: e7a2d80521d1cf25de06b6dab24391c068c03666290e6bb608429983f371af08
font_01_sfnt_off00013e84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E84 11492 bytes
SHA-256: e24a43f8acaa6a2de9c459fc31effb509279ede41e2bd9e0dff39eeffd1ea2af