Malicious PDF — malware analysis report

Static analysis result for SHA-256 24311cbbceff35d3…

MALICIOUS

PDF

81.1 KB Created: 2021-03-09 20:08:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f1e609357cd5d2655c2f655c6a545e6 SHA-1: d362a29b507ae54f76bb3c3d6ba95d3ce74603d1 SHA-256: 24311cbbceff35d353b558243e89ea8069d35dd3866278d76e8639dea971e09a
126 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, and contains numerous external URLs, many of which are hosted on disposable domains or link farms. The PDF's structure and embedded URIs suggest it is designed to redirect users to malicious sites, likely for phishing or to download further malware. No scripts were extracted, but the presence of multiple suspicious URLs points to a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://druttle.ru/123?utm_term=begutachtung+pflegegrad+pdf
    • https://gafonubizaragu.weebly.com/uploads/1/3/5/3/135346264/govoneg_balasidu_maviximonusoto.pdf
    • http://pasetbs.xyz/562462944458m4ee.pdf
    • https://tetalopen.weebly.com/uploads/1/3/1/8/131857308/loxew-jifoxojojap-ruxareruxexiwax-fulekal.pdf
    • http://mebets.xyz/torebosufag1yexg.pdf
    • http://ryursew.space/do_they_find_percy_jackson_in_the_lost_herogi2uz.pdf
    • https://dezazobe.weebly.com/uploads/1/3/4/7/134755526/wipovev_fojelizekijid.pdf
    • http://praktika-ingenieur.com/my_papas_waltz_toneqhivm.pdf
    • https://gemiporelowagi.weebly.com/uploads/1/3/0/7/130775846/9097542.pdf
    • https://cdn.sqhk.co/wejafivelij/eja9jhc/banuvu.pdf
    • http://creditactive.info/management_information_systems_managing_the_digital_firm_8th_editionwi4bz.pdf
    • http://kinoxca.xyz/astro_a20_gen_2_ps5ieurt.pdf
    • http://klokisik.space/weight_training_for_soccer_playersfl5vi.pdf
    • http://copalofa.site/33501514483b1qup.pdf
    • http://5coupons.info/rainsoft_water_softener_parts_diagramdpvrr.pdf
    • http://drive4mclaneaustell.com/custom_maid_3d_modsayuc1.pdf
    • https://cdn.sqhk.co/dabozijide/eGygecw/89040278810.pdf
    • https://cdn.sqhk.co/kawurefeki/fjyNDib/yellow_lights_lyrics_chords.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/5748efc5-fd14-495d-aa3c-aef8d00760e4/thule_bike_rack_for_2020_jeep_wrangler.pdf
    • https://uploads.strikinglycdn.com/files/961a874e-48f3-43be-91a6-656b4b2e389e/57961447079.pdf
    • https://s3.amazonaws.com/befafuni/craftsman_garage_door_manuals_download.pdf
    • https://uploads.strikinglycdn.com/files/00bd40ee-90b6-4c92-b8db-b1fbb8e738ed/what_is_thrax_supposed_to_be_in_osmosis_jones.pdf
    • https://uploads.strikinglycdn.com/files/d3fb89da-5d52-4470-badf-23a3e04de2ee/what_is_the_original_pizza_hut_crust_called.pdf
    • https://s3.amazonaws.com/vuliwisuwig/general_airframe_and_powerplant_test_study_guides.pdf
    • https://uploads.strikinglycdn.com/files/00765191-5fd6-4642-ab24-8fc8000a946c/washington_state_department_of_health_covid_vaccine_guidelines.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe13.bin
aa0ed08b557ec471f6ba4adaa3ee79d48ac0f11593263e5d59cb56e36b7939da		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE13 5288 bytes
font_01_sfnt_off00011010.bin
8e54da18843fd0ff5a4e85b55401545eb32373ab5efafef185afab1f4a51ade5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11010 11992 bytes

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