Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e7d470b0f030122…

MALICIOUS

PDF

82.5 KB Created: 2021-03-29 04:20:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f1222c53ecd79af049c4f1631931de42 SHA-1: 5528ed1b0d42c0b2b570f31ad3dabf7e59f05394 SHA-256: 9e7d470b0f03012295677f48dc2338f2a91352eb70f7e8f88d8dc6504b4e383e
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 0.9991

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 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://zajinet.ru/strik?utm_term=how+do+you+turn+on+your+keyboard+backlight PDF link annotation
    • https://cdn.sqhk.co/mekaxosur/fgibthE/10803011432.pdfIn PDF document text
    • http://mujoxoluvisukid.getenjoyment.net/nemazitoxamujisijuro.pdfIn PDF document text
    • https://cdn.sqhk.co/bogofuvizibu/jKBja1w/47020143780.pdfIn PDF document text
    • https://cdn.sqhk.co/batumozi/dxeheia/butajixad.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CqLhfN7/localizar_mi_android_por_gps.pdfIn PDF document text
    • http://gizaripe.iblogger.org/how_to_reset_casio_dr-210tm.pdfIn PDF document text
    • http://dadivasim.sportsontheweb.net/lazutavesumavesufuk.pdfIn PDF document text
    • http://sevezor.scienceontheweb.net/how_to_make_talking_pictures.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://melumudinev.epizy.com/78225380737.pdfIn PDF document text
    • http://sikekuji.epizy.com/corporate_identity_package_price_south_africa.pdfIn PDF document text
    • http://kofadokajofej.epizy.com/romowomutubupewobax.pdfIn PDF document text
    • http://jasesazolaf.myartsonline.com/5831864963.pdfIn PDF document text
    • http://wirizobesopo.epizy.com/ielts_listening_answer_sheet_sample.pdfIn PDF document text
    • https://a1d3e036-d9a1-4be1-9d2f-eedbb581cb22.filesusr.com/ugd/3ce946_719d74ea58754bdea4835ffe18b224b1.pdf?index=trueIn PDF document text
    • https://6129906d-bc82-46a7-99f5-71793a58af3c.filesusr.com/ugd/d162e3_0928cf823aac4eda82813404cc0a7f19.pdf?index=trueIn PDF document text
    • https://08c3cc13-1ce0-4add-927e-a3aed263473e.filesusr.com/ugd/ccf397_df84219404ce410196d6449df6b78e97.pdf?index=trueIn PDF document text
    • http://fafamofuwinofen.epizy.com/ikea_home_planner_italiano.pdfIn PDF document text
    • https://3dbd840c-7861-42b4-b064-af52d1d2f4eb.filesusr.com/ugd/86319b_6db0401796c54bb388f175cfcd2ed8b9.pdf?index=trueIn PDF document text
    • http://kugukokoner.myartsonline.com/cbse_biology_book_for_class_11_download.pdfIn PDF document text
    • http://reruwok.rf.gd/wixonowigetagax.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/powexujomumolodetubi.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/tantric_massage_training_courses_in_pune.pdfIn PDF document text
    • http://pilojoduzige.epizy.com/aadhar_card_correction_form_online_rajasthan.pdfIn PDF document text
    • https://s3.amazonaws.com/lowebemuwojiso/94235081526.pdfIn PDF document text
    • https://s3.amazonaws.com/sajezife/67931469221.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_off00010343.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10343 5380 bytes
SHA-256: 8a1d2cf1f1bbac84515b6b324d191a32b239e4670c44484e416d5382d5721bbe
font_01_sfnt_off0001159e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1159E 11212 bytes
SHA-256: 510b4868cbc1e3072f656a9dcb2c3145c194dbdaa6f1242fdabd074ad53fccb9

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