Malicious PDF — malware analysis report

Static analysis result for SHA-256 adacce2d0bc637ea…

MALICIOUS

PDF

137.2 KB Created: 2021-03-23 14:13:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 94ff448b01c03735c96ad4db93933262 SHA-1: 548996d6bc6228e55754062b347f55a8bb2a7c40 SHA-256: adacce2d0bc637eaeb7cd8b79d5547a91d793e9440882b0fe22be86e56cab5b5
186 Risk Score

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 0.9985

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://maypoin.ru/123?utm_term=date+format+english+month+year PDF link annotation
    • https://cdn.sqhk.co/fedelubu/gghehcP/shadow_battle_2._2_mod_apk_hack_download.pdfIn PDF document text
    • https://cdn.sqhk.co/wazafanez/ijfifED/bedojilexawusogilitaj.pdfIn PDF document text
    • https://cdn.sqhk.co/vikafaselida/jjMieig/confusing_math_questions_and_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/resilano/ljeMytO/faith_family_church_canton_ohio_live.pdfIn PDF document text
    • https://buranujepexu.weebly.com/uploads/1/3/4/3/134339299/0c406d5259ad.pdfIn PDF document text
    • https://bemixujigimo.weebly.com/uploads/1/3/0/9/130969474/ff0f26.pdfIn PDF document text
    • https://vokuduvalabi.weebly.com/uploads/1/3/4/5/134502282/90d9d76d.pdfIn PDF document text
    • https://cdn.sqhk.co/suwefememe/cjgmhcZ/spotify_maximum_limit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c27f761f-7f2a-41a6-928f-fd6fee73c52d/68753589970.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/baa4b7a3-8c79-46d1-9d8c-a579c43badc3/12669259733.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7071f5fb-8bdf-43d8-b83e-70621d4f83bd/26271402653.pdfIn PDF document text
    • https://df9f6e4b-8d15-4ffc-a22d-a689b54aa2df.filesusr.com/ugd/205ae4_46294fba6a1348d2a86d6dc8685d3443.pdf?index=trueIn PDF document text
    • https://ebba3e40-d49f-4cc8-b137-373bb1124918.filesusr.com/ugd/384ea4_53893b83646c4582a849a1158d7e8644.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f2a8ad7-cc76-4df9-bca1-2f07ec82ade4/gagemovub.pdfIn PDF document text
    • https://1b6fe947-be7e-4494-9a94-f566f178d3d1.filesusr.com/ugd/89064d_d64b6863d36040f480fc997cc870ee70.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jonora/battle_realms_full_version_crack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2054a45f-e4f3-4ab0-a0b5-31a5b4f37366/hitchhikers_guide_to_the_galaxy_quotes_dolphins.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9b6b9d5-1011-409e-b9ee-a2a500fb99fd/what_are_some_trigger_words.pdfIn PDF document text
    • https://s3.amazonaws.com/didowugorokirug/severity_and_priority_examples.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18170 10868 bytes
SHA-256: d34c08d825c7f71f2429b07f9ca6b109aca0faf7de6e3217d1cf92fb976168c9
font_01_sfnt_off0001a578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A578 5280 bytes
SHA-256: 7b983dc0b273d8bffa6a1de5be2438757245810fdaae1ac5c549ee686c7295ca
font_02_sfnt_off0001b750.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B750 4056 bytes
SHA-256: c95cd46c74eb2f8a8f0d41d5995e9d366a1ab0c35871ba1e70dbcaebf517c254
font_03_sfnt_off0001c423.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C423 19888 bytes
SHA-256: 66a07867719d5080ef68cd70a1ed51b27cacc1c547e25eb472cbecb216ca6970
font_04_sfnt_off0001f8ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F8CE 18584 bytes
SHA-256: e0aa7e99008c3ba21dc9cf6b74e78bc67678ca86fd98778bcafd6b4864385116