Malicious PDF — malware analysis report

Static analysis result for SHA-256 47b090905dafff7c…

MALICIOUS

PDF

77.3 KB Created: 2021-03-24 02:44:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1da10c2b61f18b75bcfa957b3def7470 SHA-1: 14ad950fc752d1bffc95158cf382477463e4843f SHA-256: 47b090905dafff7cb54a88814720980f811c45975c77741e10f71a79cd6923c3
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 0.9997

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://druttle.ru/123?utm_term=audacity+crackeado+2017 PDF link annotation
    • https://cdn.sqhk.co/lubigegek/sRJXShf/among_us_online_free_pc_mac.pdfIn PDF document text
    • http://wugafis.66ghz.com/excel_vba_select_cell_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/lanuniwa/6HxiBjb/62726133002.pdfIn PDF document text
    • http://padigixatobezu.22web.org/wuzajovod.pdfIn PDF document text
    • https://cdn.sqhk.co/raserijene/IhbBfic/kilazowusurozogetiseboze.pdfIn PDF document text
    • https://cdn.sqhk.co/lakekomum/iihdjis/fancy_slime_make_slime_at_home.pdfIn PDF document text
    • http://kutagugiponapa.22web.org/american_sniper_full_movie_dual_audio.pdfIn PDF document text
    • http://retys.space/underrail_build_guidea20ig.pdfIn PDF document text
    • https://cdn.sqhk.co/numisezopo/ehjsjje/48410675528.pdfIn PDF document text
    • http://bnl-jobs.com/637151610190eety.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gekinobabubi.epizy.com/equations_of_parallel_and_perpendicular_lines_worksheet.pdfIn PDF document text
    • http://tudaxaj.rf.gd/bhajan_lyrics_in_gujarati_language.pdfIn PDF document text
    • http://magonusu.epizy.com/baidu_pc_faster_free.pdfIn PDF document text
    • http://davobibifo.epizy.com/toxemuxeji.pdfIn PDF document text
    • http://suvubojetixag.epizy.com/boxer_movie_mp4.pdfIn PDF document text
    • http://turufefi.rf.gd/bahubali_part_1_tamil_songs.pdfIn PDF document text
    • http://bupagaruwizuzu.epizy.com/calendar_ortodox_2020_printabil.pdfIn PDF document text
    • http://pusudusak.rf.gd/xilijon.pdfIn PDF document text
    • http://lamekukibudinos.epizy.com/rujefosoz.pdfIn PDF document text
    • http://revifobatuge.rf.gd/appetizer_recipes.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_off0000ecb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB6 5284 bytes
SHA-256: df475d6a9220cd34415f011df5b20bcf35249c34885538ae1e87686767ed42bc
font_01_sfnt_off0000fed5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED5 12628 bytes
SHA-256: b598cb2af55ee58af6177104466f667b8025198bd4006fd539fe5e26236610e9