Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b01be6ca30a38d9…

MALICIOUS

PDF

86.7 KB Created: 2021-02-14 17:01:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 8d8f31a400d701f101f1043461d8d4e4 SHA-1: d67731a7f3095a69b27d2d4e947060968f458410 SHA-256: 8b01be6ca30a38d9c5a6155b2c221fa515e921416cb6fda2592081f9f8e20204
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains and Weebly hosting, indicating a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of numerous external links, some with UTM parameters, points towards an attempt to manipulate search engine results or lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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.
  • 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://seumenha.ru/aws?utm_term=apache+vs+nginx+performance+2019 PDF link annotation
    • https://katalulipof.weebly.com/uploads/1/3/2/7/132710678/morujagetuvak.pdfIn PDF document text
    • https://cdn.sqhk.co/tevimuwijile/OGjb5tV/lyft_driver_california_requirements.pdfIn PDF document text
    • https://cdn.sqhk.co/zolewiko/gdGjgdw/final_fantasy_7_remake_xbox_one_review.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/jdophaX/nvidia_games_download_2020.pdfIn PDF document text
    • https://rajidekexosixi.weebly.com/uploads/1/3/0/7/130738830/9130768.pdfIn PDF document text
    • https://cdn.sqhk.co/nefakovuwot/ggihajj/rgb_color_detector_using_tcs3200.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzefoveniri/hjgiigN/66344661770.pdfIn PDF document text
    • https://zeraxoxuret.weebly.com/uploads/1/3/4/6/134642117/ca499.pdfIn PDF document text
    • https://bunemevomuw.weebly.com/uploads/1/3/4/7/134733911/3141747.pdfIn PDF document text
    • https://cdn.sqhk.co/nerenina/Oy8hjzt/45530823861.pdfIn PDF document text
    • https://cdn.sqhk.co/vimibaja/ea5hjux/xaliboxuroz.pdfIn PDF document text
    • http://varuvoruva.iblogger.org/acura_rsx_5_speed_manual_for_sale.pdfIn PDF document text
    • http://zeweduzu.iblogger.org/html_form_validation_confirm_password.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dogolevoxameno.rf.gd/37781399050.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/prokaryotic_and_eukaryotic_cells_pogil_answers.pdfIn PDF document text
    • http://juzefabamurever.rf.gd/pamuge.pdfIn PDF document text
    • http://dumevurofif.rf.gd/soundcloud_go_free_apk_2019.pdfIn PDF document text
    • http://zenejifawulo.epizy.com/hypertension_guidelines_2018_jnc_8.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/good_food_guide_brisbane_2020.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_off00011360.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11360 5996 bytes
SHA-256: 5abaf58680875540017ccb71d480ab766d159a0ed3fb8a414357d5318b32aea3
font_01_sfnt_off000127b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127B4 11128 bytes
SHA-256: 7c70b8cbf36329f98d5c2784ebcd8832662543992cf4c15c058af216c687365f

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