Malicious PDF — malware analysis report

Static analysis result for SHA-256 7801eb40db78debc…

MALICIOUS

PDF

71.7 KB Created: 2021-02-18 21:31:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: fb239f8583e7072597f2e43a4b26d4ad SHA-1: a4b8c52720f1139462f68679b43e896c12ee414c SHA-256: 7801eb40db78debc8fa6828fc90c490e92ff5a54c25f1a0b567d0e2c438ed4d9
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document is classified as malicious and contains numerous external links, many of which are invisible and point to disposable domains. The document's content appears to be a lure, disguised as a technical document, to drive traffic to these malicious sites. The presence of multiple link farms and suspicious domains indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://jottigo.ru/strik?utm_term=statistical+mechanics+pathria+3rd+edition+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4406228/normal_5fd7cdae51575.pdfIn PDF document text
    • http://onenature.space/redbox_locations_in_my_areagdq41.pdfIn PDF document text
    • https://dutesemo.weebly.com/uploads/1/3/1/6/131606066/70e19.pdfIn PDF document text
    • http://ig-supportcenter.xyz/fingerstyle_guitar_music_sheet_freekj3qy.pdfIn PDF document text
    • https://cdn.sqhk.co/sepagumal/hdp1ujg/best_calendar_todo_list_app.pdfIn PDF document text
    • https://ranumurubakek.weebly.com/uploads/1/3/5/3/135341533/3937506.pdfIn PDF document text
    • https://cdn.sqhk.co/sepunaro/gi9A5a2/stick_nodes_pro_stickfigure_animator_apk_download.pdfIn PDF document text
    • http://znakomstva69.space/bowmasters_mod_all_characterspez5z.pdfIn PDF document text
    • https://cdn.sqhk.co/fepexeguma/gibhapp/mod_game_gun_master_2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368219/normal_600d963259319.pdfIn PDF document text
    • https://cdn.sqhk.co/nifodotiriru/ajgyheR/crush_hits_me.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407983/normal_6002614f7d016.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387033/normal_5fccff68765dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389581/normal_5fda918fc63c5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427509/normal_5fe43f9916a52.pdfIn PDF document text
    • https://pabimoju.weebly.com/uploads/1/3/3/9/133997489/lofibukalumupa.pdfIn PDF document text
    • http://lnstagramverifiedsbadgesforms.com/shark_night_3d_movie_castseg60.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d9dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DC 5660 bytes
SHA-256: e5b9dbf26c6062b7c0d467c47916a0f49f1bd9e431bfe1a370dde7a26dcddf32
font_01_sfnt_off0000ecf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECF6 10752 bytes
SHA-256: 6c31fb0816e0fe6a84e905c9d2966624148a810d1b528a1ef440436de1d0d4b0

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