Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ac8ea2368554ecf…

MALICIOUS

PDF

72.9 KB Created: 2021-06-04 16:51:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: ade9ba1af21c8cd84c1895d6d3d8dee0 SHA-1: c0ed9f82560564534898ca87e3f943455d490280 SHA-256: 1ac8ea2368554ecf278f0a3d46edf7f81b0c071efb57b61bcda1c6dff496f477
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous embedded links, many pointing to disposable hosting and link farms, with a primary URL suggesting a lure for game data downloads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a phishing or downloader attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://oniceh.ru/pbw?utm_term=gta+v5+apk+and+obb+data+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4445749/normal_5fdd27e469c80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465000/normal_600f08214aaa8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418579/normal_60616355654d7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465149/normal_60369e3dad888.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jozeluwofe.pbworks.com/f/diwogiropewoxak.pdfIn PDF document text
    • http://mulasamesi.pbworks.com/w/file/fetch/144571899/how_long_does_dexcom_g6_sensor_last.pdfIn PDF document text
    • http://mukonisu.pbworks.com/f/47795680578.pdfIn PDF document text
    • http://lekuzax.pbworks.com/w/file/fetch/144412074/list_of_city_names_in_india.pdfIn PDF document text
    • http://ziriwuru.pbworks.com/f/snap_on_smile_from_wish_instructions.pdfIn PDF document text
    • http://paderukut.pbworks.com/w/file/fetch/144609348/lanetasikifisitugoliw.pdfIn PDF document text
    • http://demopefo.pbworks.com/f/sizegugemi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca759134-20b4-40e8-b828-2b2d55dd6c83/cannery_row_restaurants_monterey_ca.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4e85a44-768b-4793-a2ad-bac45be193b9/power_cooker_8_quart_digital_pressure_cooker.pdfIn PDF document text
    • http://jesababa.pbworks.com/w/file/fetch/144609288/aimbot_apk_for_android_auto.pdfIn PDF document text
    • http://ziduzobif.pbworks.com/f/zumukepotexidetuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef1f6396-27cb-4c88-b531-6733908b7f2b/what_are_aristotles_6_elements_of_theatre.pdfIn PDF document text
    • http://fixulirulafa.pbworks.com/f/noxokibuxebojiwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5de56092-7973-466c-b9df-b3f6dbb45111/pekusobabe.pdfIn PDF document text
    • http://nuwiwaweber.pbworks.com/w/file/fetch/144615033/epson_adjustment_program_download_gratis_l1300.pdfIn PDF document text
    • http://sajateves.pbworks.com/w/file/fetch/144442707/free_download_crack_corel_x7.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_off0000e15c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE15C 5188 bytes
SHA-256: cfe7d7056fc3bb201b2774eeaf169315790689aaff1438db40d1f94b45a54dbe
font_01_sfnt_off0000f334.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF334 10352 bytes
SHA-256: 57ac11e2360e16f4ac7d1c16bc5d494217e30340af3b5e376973abafc04d4b80

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