Malicious PDF — malware analysis report

Static analysis result for SHA-256 18efc589191cbf38…

MALICIOUS

PDF

68.2 KB Created: 2021-06-12 04:57:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0e0986fbd98315dca6a9245379766f25 SHA-1: a8e209f555ac32356c24c67fb471a78edd3f4c3c SHA-256: 18efc589191cbf38197b8602294df1979961e3e118d4b98358bee441e6a6e3c2
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one prominent URL pointing to a suspicious domain ('queure.ru') that is likely used for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, further suggesting malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a social engineering attack to redirect users to a malicious site.

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://queure.ru/pbw?utm_term=the+colour+monster+pdf+free PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tufukamapaf.pbworks.com/w/file/fetch/145057296/falab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/629651b8-660f-41d8-8383-4d61dce4fd08/south_indian_veg_dinner_menu_list.pdfIn PDF document text
    • http://fobimexus.pbworks.com/w/file/fetch/145084266/direct_proof_examples_discrete_math.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7ac73b1-0914-4cdf-a6ea-492e316c8dc2/what_are_some_brand_names.pdfIn PDF document text
    • http://murenet.pbworks.com/w/file/fetch/145161954/the_sims_bustin_out_gba_walkthrough.pdfIn PDF document text
    • http://pimepovume.pbworks.com/f/punjab_kite_flying_act_2020_download.pdfIn PDF document text
    • http://matajin.pbworks.com/w/file/fetch/144712917/usa_studies_weekly_5th_grade_week_25_answer_key.pdfIn PDF document text
    • http://tazijebep.pbworks.com/f/lezuxabisifoge.pdfIn PDF document text
    • http://rujuboxu.pbworks.com/w/file/fetch/144457416/formal_and_informal_email_writing_examples.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/199b1bae-b7ee-48e1-8691-e071aa1ac00e/pirates_of_the_caribbean_3_telugu_dubbed_movie_movierulz.pdfIn PDF document text
    • http://lojefizowoj.pbworks.com/f/ets_2_download_apk_for_android.pdfIn PDF document text
    • http://dejimebez.pbworks.com/f/49752174821.pdfIn PDF document text
    • http://palejemevat.pbworks.com/w/file/fetch/144709695/shopsmith_10e_speed_changer.pdfIn PDF document text
    • http://molosafokaji.pbworks.com/f/free_12_week_dumbbell_workout_plan.pdfIn PDF document text
    • http://zabodovojif.pbworks.com/w/file/fetch/144426162/lukeref.pdfIn PDF document text
    • http://wejojixi.pbworks.com/w/file/fetch/144949752/15614431099.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8a73a50a-d6b2-4f0c-a112-d70526c0a5a6/john_deere_d170_54_inch_mower_deck_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f352613e-4e95-4768-8c63-f067e92826aa/2194959122.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99226a36-d6f0-4594-8bc8-49a03da81c37/sel_351a_ordering_code.pdfIn PDF document text
    • http://fudotedafeji.pbworks.com/w/file/fetch/144913023/libefojefibitam.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_off0000d080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD080 5132 bytes
SHA-256: 9e6b2caca18fce94c411461634ed04a0445e418b16b1fd68b3615e4ebb371e8d
font_01_sfnt_off0000e1ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CE 10236 bytes
SHA-256: 0507ea4a2938afb3b46a8797d4c71117e2015151ab7b772253827074bcfdffbc

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