Malicious PDF — malware analysis report

Static analysis result for SHA-256 3cd1ba87116168a2…

MALICIOUS

PDF

79.6 KB Created: 2021-06-06 17:54:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 225ae746e41a3f54136d8db6446f0b05 SHA-1: 11a8122fcb92e355c90aee2d63b492eeb1390d27 SHA-256: 3cd1ba87116168a2b96960061ae70ba4c01d398c60307bc79ad8c18917e78b5b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://jumiwimov.ru/123?utm_term=android+pie+ambient+display+settings PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4444123/normal_5ff4ceca433ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446285/normal_6036ade28544d.pdfIn PDF document text
    • https://kepiloxuxamife.weebly.com/uploads/1/3/0/7/130740378/e4ce0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490264/normal_6013d83fdf729.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483336/normal_60425eec15ad5.pdfIn PDF document text
    • https://dowoxadi.weebly.com/uploads/1/3/1/3/131380004/6032349.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393370/normal_6058a83e63dbe.pdfIn PDF document text
    • https://kimonasisu.weebly.com/uploads/1/3/5/4/135400987/tokevorazi_biwoxego.pdfIn PDF document text
    • https://gekigojux.weebly.com/uploads/1/3/4/3/134339050/ab28f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gabekujijud.pbworks.com/f/pedibub.pdfIn PDF document text
    • http://tedadopite.pbworks.com/f/lawofojufejilotepupewi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5dcda88-99f8-4581-8819-5f2860411bef/what_kind_of_battery_for_garage_door_keypad.pdfIn PDF document text
    • http://xojipoxar.pbworks.com/f/how_did_catwoman_get_her_powers_in_batman_returns.pdfIn PDF document text
    • http://tekitejug.pbworks.com/w/file/fetch/144670059/t-mobile_syncup_drive_review.pdfIn PDF document text
    • http://tazijebep.pbworks.com/f/73871512537.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2543f67-25fd-4a5d-86c7-76f1b61cfd5b/gta_iv_free_download_for_pc_full_version_setup_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ec217d0-f35f-4143-a98b-28cde14e2c68/femiza.pdfIn PDF document text
    • http://joxupakager.pbworks.com/w/file/fetch/144653256/will_soda_kill_rats.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60b1aeff-1ad3-48c1-91d5-21600b62a1a5/60827988655.pdfIn PDF document text
    • http://poxanoralanu.pbworks.com/f/envision_math_book_grade_5_answer_key.pdfIn PDF document text
    • http://lugozamuxika.pbworks.com/f/what_type_of_stress_causes_rock_layers_to_fold.pdfIn PDF document text
    • http://ziduzobif.pbworks.com/f/what_is_prison_labour.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF834 5512 bytes
SHA-256: 86a0c3f1d672775774c5c3c7b0a789928848757f00017784a3be0ccd6b0cd9ca
font_01_sfnt_off00010adc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10ADC 10596 bytes
SHA-256: a3adad66cf3158022d9efca27094a3d3e3f7e5b308ee07a5fafbf92e9c2eee55

Open this report in the interactive analyzer, or submit your own file for analysis.