Malicious PDF — malware analysis report

Static analysis result for SHA-256 58d0f4984985c792…

MALICIOUS

PDF

80.1 KB Created: 2021-04-07 04:21:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bdebaf1f25830f9cb928f918d5a327ac SHA-1: 72c9f678aff8a10f2d90460d310b7dbbf97d5b3c SHA-256: 58d0f4984985c7924cebb046d6625ba6a3064eb00670a2b96e619a6e0e289729
126 Risk Score

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 0.9994

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://vilenefex.ru/wix?keyword=dion+dimucci+abraham+martin+and+john+other+recordings PDF link annotation
    • https://cdn.sqhk.co/baruduwege/jdMifha/67877692626.pdfIn PDF document text
    • https://cdn.sqhk.co/noperizapewo/dhdVsjd/carve_pencil_art.pdfIn PDF document text
    • https://cdn.sqhk.co/vinikawikuve/15ZAFii/desktop_tower_defense_pro_hacked.pdfIn PDF document text
    • http://nosinoski.shop/sofewumezagadelipijugs08g.pdfIn PDF document text
    • http://nanaxoxadod.iblogger.org/kinds_of_adjectives_worksheets_for_grade_5.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/ifhhij3/87324609377.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/ViaGn51/leo_and_tig_episode_list.pdfIn PDF document text
    • https://cdn.sqhk.co/pewesopefim/XPSifhe/30887516765.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/gdmBwia/defender_2020_for_sale_dubai.pdfIn PDF document text
    • https://cdn.sqhk.co/vabedesi/itdwlq9/python_dictionary_add_item_at_beginning.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/cjbwKj0/como_hackear_ifighter_2_the_pacific_1942.pdfIn PDF document text
    • http://vugewanir.22web.org/winuxatakukudepuxavuzok.pdfIn PDF document text
    • https://cdn.sqhk.co/mapetidul/cghcfd7/2643226066.pdfIn PDF document text
    • https://cdn.sqhk.co/samofetob/h3MjhjS/48488992283.pdfIn PDF document text
    • http://vukifaralefer.iblogger.org/what_are_the_5_proofs_of_the_existence_of_god.pdfIn PDF document text
    • http://stickerrus.ru/hooks_bell_1992._black_looks_race_and_representationt0yiu.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/ee019e7a-28aa-46bf-9a6f-52a21c107c7c/2014_jeep_grand_cherokee_reviews_consumer_reports.pdfIn PDF document text
    • http://muxosuzu.rf.gd/what_is_social_research_slideshare.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95c66387-4281-4bcd-ae2a-a1e12f9903b1/40841984969.pdfIn PDF document text
    • http://fovodikil.rf.gd/69991124800.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d01e92c-81cb-4097-ac09-9101d770264a/nabenonunubutonigogugaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6604b28a-b261-4d96-b837-739b12e3b3c5/how_to_scroll_magic_mouse_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a81a42d-c399-4798-8226-f547b8048642/vekuzusiz.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_off0000f9dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9DC 5536 bytes
SHA-256: 05d6050c10bf458e9c0616ffad11bdb72fccbd5bcb2ba986ba8e45f3f9d71e52
font_01_sfnt_off00010c86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C86 11568 bytes
SHA-256: c17d98c0c83fbdde466c22154cf9ef2d77a565d92225d98379d64079bc138ba7