Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc8d8fc09d123e86…

MALICIOUS

PDF

81.4 KB Created: 2021-03-24 04:17:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 06d3eb16540e265ac103ebfccf629538 SHA-1: dd000c8dba4626a34f6a3fa085d10be9d1552c15 SHA-256: bc8d8fc09d123e86f38571fcdc2e540c627767ac3ea9afc1a339725c21c866d7
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with a primary focus on redirecting users to 'https://maypoin.ru/wix?keyword=que+es+un+verbo+conjugado+ejemplos', suggesting a phishing lure disguised as a search result. The document body is heavily obfuscated, preventing a clear understanding of its specific content beyond the lure, but the overall structure points to a malicious intent to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://maypoin.ru/wix?keyword=que+es+un+verbo+conjugado+ejemplos PDF link annotation
    • http://fisareboveda.getenjoyment.net/61030422868.pdfIn PDF document text
    • http://lamanixumerad.mypressonline.com/how_to_set_up_homeworx_digital_converter_box.pdfIn PDF document text
    • https://cdn.sqhk.co/junuxuseg/l1cZJ2j/c_for_dummies_free.pdfIn PDF document text
    • http://mizebojusur.mypressonline.com/naxolidunokamipufiged.pdfIn PDF document text
    • https://cdn.sqhk.co/banamasuvaj/aghoifF/fidget_spinner_island_animal_crossing_new_horizons.pdfIn PDF document text
    • https://cdn.sqhk.co/rijakobebux/hifZujg/jijasuvijuk.pdfIn PDF document text
    • http://tobaliwono.mygamesonline.org/36436873880.pdfIn PDF document text
    • https://cdn.sqhk.co/wogirujut/sBjjgjc/usa_today_sports_images_recent.pdfIn PDF document text
    • https://cdn.sqhk.co/fovuxugo/j4Exmjg/dawajebotapupowuluvenaji.pdfIn PDF document text
    • http://sawemawe.mywebcommunity.org/bunuxidaxu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lugenizuridaj.atwebpages.com/coldplay_scientist_lyrics.pdfIn PDF document text
    • https://932aa67c-856a-4fda-9fc8-fe3f50d4acc2.filesusr.com/ugd/a25eee_8863ebef44d24a77955d114a85018e54.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0421fc7-fd5d-4e1b-9a34-1175d83491ea/the_one_year_chronological_bible_study_guide.pdfIn PDF document text
    • http://kemesid.onlinewebshop.net/150_minimalist_house_ideas.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/how_to_start_a_generac_electric_start_pressure_washer.pdfIn PDF document text
    • https://03dfb0eb-7fe6-4188-ad87-ea2b88df7b19.filesusr.com/ugd/f967ac_9aede9052f7547878380b76354182694.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c69b9a9e-8afe-4d87-a03f-ed2fead88a21/league_of_legends_patch_notes_10.5.pdfIn PDF document text
    • https://0f8fedcd-12c0-4678-86f8-e2bff7269121.filesusr.com/ugd/70e7d4_74087499a5704d248854644ed01bb2c1.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7775d478-d21a-42cf-bb91-c0c84e1af275/22321225616.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c5fbad9-8c48-4fd5-bcf9-d8fa82dcdeb4/medicare_benefits_policy_manual_chapter_6.pdfIn PDF document text
    • https://s3.amazonaws.com/jixeremipet/23919243806.pdfIn PDF document text
    • http://vawirir.atwebpages.com/zarekopuwodewamadepolitu.pdfIn PDF document text
    • https://s3.amazonaws.com/wobuzisibal/gba_emulator_games_free_zip.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_off0000fddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDB 5732 bytes
SHA-256: f9b6da61a6f58cc2e2a79cd7106bb91150d32a5fa6188a1012fdf8010a1e546c
font_01_sfnt_off00011145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11145 11664 bytes
SHA-256: e50aabc40b563e67127def1a930417dbb874ba561600747a5070f56a5b6c4dbb