Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d2e6267da4ffeff…

MALICIOUS

PDF

79.0 KB Created: 2021-03-23 03:25:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: bafb4ead01a4081b091536b6df9ebc02 SHA-1: 827fb77cc16b28f32b7dfe3ced5ed8b6f285ec98 SHA-256: 4d2e6267da4ffeffc806a1f3f499a8ec3123cb0fbb8a660e8772455f21cbc883
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The file contains a large number of external links, many pointing to disposable hosting, suggesting it functions as a link farm designed to redirect users to potentially harmful websites. The presence of the URL 'https://druttle.ru/123?utm_term=android+log+application+activity' further supports a phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • 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://druttle.ru/123?utm_term=android+log+application+activity PDF link annotation
    • https://cdn.sqhk.co/wexunaveb/ahiWEQk/virtual_regatta_inshore_ou_offshore.pdfIn PDF document text
    • https://rowusebejaron.weebly.com/uploads/1/3/1/6/131637242/pomikapagufabokexot.pdfIn PDF document text
    • https://cdn.sqhk.co/semejegofip/jahd6jb/bike_wheel_size_calculator_height.pdfIn PDF document text
    • https://gedimonisesejed.weebly.com/uploads/1/3/1/1/131163996/bobozu_wujovofofefuje_botiwifibufa.pdfIn PDF document text
    • https://luzepomi.weebly.com/uploads/1/3/1/8/131856518/7849ab9.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/bibjjaf/63306566902.pdfIn PDF document text
    • http://felesatediz.medianewsonline.com/lonely_planet_philippines.pdfIn PDF document text
    • https://cdn.sqhk.co/jipodipotaj/ieXifif/45754675532.pdfIn PDF document text
    • http://junumidutuzakox.getenjoyment.net/duvomujusiwujesamatud.pdfIn PDF document text
    • https://cdn.sqhk.co/poturofivat/chjzgfN/max_payne_mobile_cheats_apk.pdfIn PDF document text
    • https://pakurematumomu.weebly.com/uploads/1/3/4/7/134764434/lurakemaxew_nitofinabozusu.pdfIn PDF document text
    • http://pimesizawox.sportsontheweb.net/construction_company_profile_format.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://938a05da-450f-421e-a59b-0448473a402a.filesusr.com/ugd/cb5dea_8e42e81213624f9b9fcd0daf27bed256.pdf?index=trueIn PDF document text
    • https://434dcbc4-7bd9-40fe-99bf-e102daebf961.filesusr.com/ugd/07ef24_26db6331fd67423ca3c354364225c9a4.pdf?index=trueIn PDF document text
    • https://855e1e5b-0daf-4dce-aa73-dfad2bfec5df.filesusr.com/ugd/ced2dc_4233240d10fd430b91eed92bead803df.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2cf22086-0e43-4eff-bad6-26f64e43f147/26568536473.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b81cab93-0448-43f8-bea8-ed26daeea320/jinujujagozokuxuviriro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db6d95fb-8333-45a5-8fa2-f2111914f705/93816870359.pdfIn PDF document text
    • https://68420551-d949-41c4-975b-2ae86aa6d062.filesusr.com/ugd/09c3c7_dadb4d8c8edb4fb68f941d6f7e6d19ce.pdf?index=trueIn PDF document text
    • https://df1d5e35-4e67-4e57-ba41-6141a32c4ecb.filesusr.com/ugd/c54278_e0f7006c5b9342509bb02ebb60ab6b95.pdf?index=trueIn PDF document text
    • https://f7f2eb1f-4ce6-40bf-b337-6bcc2c9c1a95.filesusr.com/ugd/dc6899_c4d969d1d96f4e60bb6d4d0ab86915f8.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_off0000f6c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C6 5212 bytes
SHA-256: 77b1124204e21d242d3bdced6096594e7de5c3eb3057c36c424fad3327a3520c
font_01_sfnt_off0001089e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1089E 11160 bytes
SHA-256: 210fcecbed707c45982f4bb2679826af5a050269808cd7de8e9c24b7489df2f8