Malicious PDF — malware analysis report

Static analysis result for SHA-256 11ce7c2fc2944e2d…

MALICIOUS

PDF

76.0 KB Created: 2021-04-05 08:10:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: ea96de983c213707655f31b8e9492cbb SHA-1: 5dc333295f2f78015b7889379a48defe9718c95e SHA-256: 11ce7c2fc2944e2dd00071cf80a003df377f1c0a5be8a5fe9ebd14de8d164ed9
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to disposable domains, consistent with a link farm designed to redirect users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, suggesting the document is part of a phishing or malware distribution scheme.

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://ponafet.ru/aws?utm_term=artificial+neural+network+example+in+matlab PDF link annotation
    • http://site-shop.xyz/pop_cubes_for_saleq2rhw.pdfIn PDF document text
    • http://bigowet.xyz/is_bandwidth_and_speed_samem8h8y.pdfIn PDF document text
    • http://italystore.pro/the_elementalists_choices_chapter_11_answerst6t8m.pdfIn PDF document text
    • http://dexaputanit.mygamesonline.org/88110654436.pdfIn PDF document text
    • http://springtea.space/60822800707ditcg.pdfIn PDF document text
    • http://akvatehnika74.ru/game_green_farm_3_hack_apkbcrtn.pdfIn PDF document text
    • http://coolmag.biz/fighting_the_great_war_western_frontt4jdk.pdfIn PDF document text
    • http://studyweb.site/gse_algebra_1_unit_1_relationships_between_quantities_and_expressions_study_guide0oflr.pdfIn PDF document text
    • http://kawasus.scienceontheweb.net/adt_cellular_monitoring_prices.pdfIn PDF document text
    • http://clubstore.info/wugorewopznvan.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/0495bacf-c861-4061-ae55-a7d4e50d52a3/how_to_update_flash_on_chrome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4446b3b3-7bea-420a-80e9-8f5874a967ea/2013_jeep_grand_cherokee_electrical_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f401b238-82ef-47b5-ae37-f453e3ad8bff/39646840811.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a154bdbc-c68f-4797-8a2e-bdb56e5c3c77/how_do_i_set_the_day_on_my_timex_indiglo_watch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/961ce5df-5754-424b-89c3-765c59cdfdd4/how_to_edit_image_size_in_paint.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da1617b7-d483-4ea3-a383-de86ff1030f1/35795446045.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1a67614-874d-4d0c-a43c-91c972964b9f/36454761205.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9671ed74-7f38-432c-b59a-0bcfd27c744e/gopro_hero_4_silver_max_sd_card.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_off0000e99d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE99D 5336 bytes
SHA-256: f83c47425d4be705fab2b77733144f417e4f7ef6b9fddccd00c815cf1ca45a5f
font_01_sfnt_off0000fbbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBBF 11440 bytes
SHA-256: b4f8b1a2db3816bfaca3d534a8d670e4ee7415d038f6deeccb0018a5d03a76ec

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