Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dc85a311d045ffb…

MALICIOUS

PDF

78.9 KB Created: 2021-06-09 18:51:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 088c68f985e0eb9ab424c8581eacda89 SHA-1: e209b1aadd7f87950261ca074ac062d48e8a3c60 SHA-256: 7dc85a311d045ffb98f3d057cd205a2b92ed189621b50ab131e9a74ed4542aef
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. The PDF contains numerous links, many pointing to disposable hosting, suggesting it functions as a link farm designed to redirect users to malicious sites. The embedded content, though heavily obfuscated, likely serves to facilitate this redirection or exploit.

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://huntic.ru/pbw?utm_term=hiss+nyt+crossword PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416321/normal_6047943516d87.pdfIn PDF document text
    • https://bimeriwuju.weebly.com/uploads/1/3/4/9/134901074/pagibowi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453718/normal_60206d5be645e.pdfIn PDF document text
    • https://sedezexe.weebly.com/uploads/1/3/4/3/134342112/duxarolusura-juxoregeno-zoviwosegajo.pdfIn PDF document text
    • https://xovoxabazilepot.weebly.com/uploads/1/3/6/0/136054719/21d9d1d8d952.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414166/normal_601217623d368.pdfIn PDF document text
    • https://tikefukexizuse.weebly.com/uploads/1/3/4/8/134879623/6cc326aee0f8de3.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/402a390b-37eb-4c67-b938-d273f370e452/50078501614.pdfIn PDF document text
    • http://menovokosi.pbworks.com/w/file/fetch/144926490/35860570620.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0105e82-c872-414a-8a42-9697e65f005c/jupyter_notebook_add_kernel_venv.pdfIn PDF document text
    • http://xafusigivu.pbworks.com/w/file/fetch/144661794/financial_reporting_council_of_nigeria_act.pdfIn PDF document text
    • http://felabinoj.pbworks.com/w/file/fetch/144913116/streaming_fifty_shades_of_darker.pdfIn PDF document text
    • http://ritijix.pbworks.com/w/file/fetch/144487023/how_to_ground_pound_in_super_mario_sunshine_on_switch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9f6db0e-2091-4bfe-8d09-fa04cea38bc7/59356057719.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7cf09f2d-ad85-4838-98ce-516952ebeaea/pioneer_deh-80prs_firmware_update.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25cb1c9b-e81e-4ad8-ae6d-7fdc501550c0/jamixowoxidemida.pdfIn PDF document text
    • http://votekotokuz.pbworks.com/w/file/fetch/144842955/jack_lalanne_juicer_recipes.pdfIn PDF document text
    • http://poxanoralanu.pbworks.com/w/file/fetch/144426492/tamil_comedy_movies_2016_free_download_in_tamilrockers.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_off0000f865.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF865 4848 bytes
SHA-256: 8b6ed81725be82d91e18a7436d5f75b6b4919fbc8ddcdc7d6c2f4bfcce5b900f
font_01_sfnt_off00010909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10909 11140 bytes
SHA-256: 249980ac1c0555e38c5ee731f41108fccc4cd514924291694b2e280dc7787476

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