Malicious PDF — malware analysis report

Static analysis result for SHA-256 286748439810154e…

MALICIOUS

PDF

83.2 KB Created: 2021-04-03 00:01:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 9059bdbc6e071c50781e12b746c59f3b SHA-1: 543ac3d4b8abbc0bc68d8ffdfcb07aede2d46870 SHA-256: 286748439810154e72a755dbd29690ce1c58b6861d070d22da32a125cc10bbdd
186 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 0.9998

Heuristics 6

  • 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.
  • 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://kuzutuzo.ru/award?keyword=gta+san+andreas+all+cheats+codes+pdf+file+download PDF link annotation
    • https://talesana.weebly.com/uploads/1/3/4/8/134878252/fajumemiwikez-gawin-totiba.pdfIn PDF document text
    • http://lewodazegozi.iblogger.org/cardcaptor_sakura_wallpaper_hd_free.pdfIn PDF document text
    • https://bemaxeviliw.weebly.com/uploads/1/3/4/4/134482954/jabidegodakin.pdfIn PDF document text
    • https://wegakerovosa.weebly.com/uploads/1/3/0/8/130873826/dagejoji_dusuj.pdfIn PDF document text
    • https://gulapekojikag.weebly.com/uploads/1/3/2/7/132741551/552fa3b5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://298c7861-702e-4dad-8e6b-798164301c36.filesusr.com/ugd/98adb1_a4bad584d322425286418f6e4fec6046.pdf?index=trueIn PDF document text
    • http://pizenusogusu.atwebpages.com/prefix_and_suffix_worksheets_for_grade_2.pdfIn PDF document text
    • https://8d684a1e-4078-49cd-b336-05adf09473b6.filesusr.com/ugd/2b25e8_0f09fea33db5419abd31f7bfca982695.pdf?index=trueIn PDF document text
    • https://86a9da1b-0b57-4b35-a77a-523886b904cd.filesusr.com/ugd/0d9a50_13c4b7dda08545758f28aec063052bba.pdf?index=trueIn PDF document text
    • http://xupewopomiboti.epizy.com/28790172571.pdfIn PDF document text
    • http://pedagodisulor.epizy.com/finding_angle_measures_of_a_right_or_isosceles_triangle_given_angles_with_variables.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ceefad45-a371-407a-b629-dc567e1dad50/hoover_windtunnel_max_capacity_pet_upright_vacuum_review.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/40427321455.pdfIn PDF document text
    • http://jisijuvod.myartsonline.com/painting_with_a_twist_dallas_tx_75209.pdfIn PDF document text
    • http://tirisesu.onlinewebshop.net/1742634950.pdfIn PDF document text
    • http://fusizizugunu.epizy.com/motor_vehicle_bill_of_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4829aeec-2586-4755-b82d-0f297c78c2b1/honeywell_thermostat_th8320r1003_installation_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/informative_writing_prompts_for_high_school.pdfIn PDF document text
    • https://e7f45dcf-1957-410e-85b1-216e85a225c4.filesusr.com/ugd/a2c2bc_438425523efb4efd8fd165f862fad1ce.pdf?index=trueIn 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_off00010689.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10689 5368 bytes
SHA-256: edcd74767a73a0aa516ccbb2c4d9f6ab58037e54fe42753f127a2f7c0bb3fb68
font_01_sfnt_off000118d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118D8 11300 bytes
SHA-256: 18677afc41220873e7630c7153c6c146f06c615010858d0c8954ca099184ae8f

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