Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0e0932ea4e28275…

MALICIOUS

PDF

100.5 KB Created: 2021-04-06 17:16:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 94a625d6fb62716c44e2fd8d71b5036b SHA-1: b084f816318567224ebe25f4d598f9224d6afbae SHA-256: a0e0932ea4e2827581b1bd95aa8749abcc29b022a2146dad6746b35ebf085b07
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous external URIs, including those hosted on disposable domains and link farms, suggests a phishing or malware distribution campaign. While no scripts were explicitly extracted, the PDF format and embedded URLs are commonly used to deliver malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/award?keyword=pocket+anesthesia+pdf+download PDF link annotation
    • http://antonioit.fun/13005391502j84k4.pdfIn PDF document text
    • https://cdn.sqhk.co/lirebirab/0ig8hf7/emergency_dental_omaha_medicaid.pdfIn PDF document text
    • https://cdn.sqhk.co/ridasozewe/GxharbR/project_snare_drum_for_sale.pdfIn PDF document text
    • https://samaruwopag.weebly.com/uploads/1/3/0/7/130738554/tudamuwunep_lafoxokulatilij_devabopejafiju.pdfIn PDF document text
    • http://flymoney.net/daxonelorowaxi0si7t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405930/normal_606b0c7caa8f0.pdfIn PDF document text
    • http://smartbright.club/how_to_loosen_knots_in_rope4sv5m.pdfIn PDF document text
    • http://agent-spv.space/new_mexico_tech_first_responder_training_programu0tor.pdfIn PDF document text
    • http://sbrf.link/dominos_philly_cheese_steak_pizza_calories_thin_crustf053e.pdfIn PDF document text
    • http://esclick.pro/best_buy_cordless_phones_for_hearing_impaired27yf0.pdfIn PDF document text
    • https://cdn.sqhk.co/gegefemorosu/hiribje/snow_storm_superhero_mod_apk_latest_version.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407576/normal_5fcd8064a8bde.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375522/normal_5fdb99343cb7f.pdfIn PDF document text
    • https://cdn.sqhk.co/zejizoguzut/xhbT0ia/zukizidofumufaniwidika.pdfIn PDF document text
    • http://biolinkus.me/30513427906fmo8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483082/normal_60418409eac76.pdfIn PDF document text
    • http://modernstyle.pro/mulujuximiminaryl63.pdfIn PDF document text
    • https://cdn.sqhk.co/vuzowadijavu/jjjjfjc/42312121840.pdfIn PDF document text
    • https://dorixakogika.weebly.com/uploads/1/3/6/0/136051108/webekanozogipoxazig.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/f05a4550-78b3-4aed-94b1-b65d93dfaa28/7522662285.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40215678-4062-4fad-8652-a5a1e6b0f786/dikozamejiwifekuwulixema.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2eae5d85-4eaf-48f9-b4bd-3511f080850e/the_book_of_knowledge_the_keys_of_enoch_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa374588-3c33-4ff6-acc6-c5c0df188dfd/why_does_my_pool_heater_keep_shutting_off.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/976c3a20-a338-4eb9-a13a-7b3308df9704/what_is_the_plot_of_a_study_in_scarlet.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001200e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1200E 6492 bytes
SHA-256: b9c1bd2281f23f09d905494077011cda678d8ff8a20e62f41a46584ce81a564d
font_01_sfnt_off00013043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13043 5304 bytes
SHA-256: 7a4e1a30fcf9296e5c7bb6dd94662784d0aec60517c33d33145feac40dd86a18
font_02_sfnt_off0001426b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1426B 13700 bytes
SHA-256: e054a91ae1f240e47c5aa9a14030f6dc4daff5c581dde558c7b8018492ec4029
font_03_sfnt_off00016e91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E91 16060 bytes
SHA-256: 99ddc6f5858eb134f8024171ebe717cbd02485c31471b921a5021903b5272953

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