Malicious PDF — malware analysis report

Static analysis result for SHA-256 9efa99f7b44a0c0c…

MALICIOUS

PDF

81.6 KB Created: 2021-02-25 22:40:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: fd24b69d10da47561494b724611f0f70 SHA-1: cc9179a771ada93a1ce54491b2827c0f9d68717c SHA-256: 9efa99f7b44a0c0c245d4ed70e015cc6b8170f6b333e645e233726a469f4ea91
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm on disposable hosting, with numerous external URIs pointing to various PDF files. The document body, though heavily obfuscated, contains keywords related to emulators and ROMs, suggesting a lure for potentially illicit content. The presence of embedded URLs and the nature of the heuristics strongly suggest this file is part of a phishing or SEO manipulation campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wix?keyword=n64+emulator+roms+unblocked PDF link annotation
    • http://fevonijanufoweg.iblogger.org/cylinder_liner_protrusion_worksheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464524/normal_6009c8fe4143d.pdfIn PDF document text
    • http://xoxuvajes.mywebcommunity.org/72138264374.pdfIn PDF document text
    • http://inscarusa.info/iferror_google_sheetrvwk3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369772/normal_5ff57860a93e7.pdfIn PDF document text
    • http://slmit.space/73128676460hlrqh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501380/normal_5fd0843163af1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483842/normal_6019d69454d30.pdfIn PDF document text
    • http://digitalcalakk1.xyz/super_mario_world_adventure_hackzf0z2.pdfIn PDF document text
    • http://organize.shop/zowufuno5r16u.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zuxekesimulir.epizy.com/teziwofatulig.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/acha_chalta_hu_song_dj.pdfIn PDF document text
    • http://kopolug.myartsonline.com/where_does_the_keurig_water_filter_go.pdfIn PDF document text
    • http://xugivazule.rf.gd/music_maker_free_for_windows_7.pdfIn PDF document text
    • http://jasunusemoki.onlinewebshop.net/48404245003.pdfIn PDF document text
    • http://vumazudu.rf.gd/fivamofeniritibamirupiwo.pdfIn PDF document text
    • http://lilufunom.epizy.com/bedanizawe.pdfIn PDF document text
    • http://pozidijapepore.atwebpages.com/double_bar_graph_worksheets_4th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/should_i_go_to_disney_world_in_january.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECAC 5500 bytes
SHA-256: 177960dbba7cc7af270c34448047068e6175c54054012b4ebff3c55383e66789
font_01_sfnt_off0000ff50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF50 10184 bytes
SHA-256: de667212f93529b8f062b900f7403b11c7148a867102f90d0fc1637d7059d05b
font_02_sfnt_off00012271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12271 16496 bytes
SHA-256: 441cd8e52334e54c69492f1e9634879a2f51cab13b55c76d7f83b9cb9c14f1dc

Open this report in the interactive analyzer, or submit your own file for analysis.