Malicious PDF — malware analysis report

Static analysis result for SHA-256 48e94becf75916c9…

MALICIOUS

PDF

180.3 KB Created: 2021-04-06 10:18:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6f42ce6d46fac2da74b3ab1f39bae4f1 SHA-1: b01e4fdc8d606d0559006b0c3c8657e9d8c27bf4 SHA-256: 48e94becf75916c98f8d2897ddd5f144d3f463af75044d2aaabda40ba3b1ef01
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://resalured.ru/wix?keyword=partes+de+la+flores+y+sus+funciones PDF link annotation
    • http://mixed-rootwork.com/thuc_metformin_10006tl8f.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CtjdgtM/fast_money_halftime_report_cnbc_fix.pdfIn PDF document text
    • https://cdn.sqhk.co/gexopoku/dJxPKSS/crash_tag_team_racing_unlock_cars.pdfIn PDF document text
    • http://wemepena.iblogger.org/wreckfest_tech_demo_2._0.pdfIn PDF document text
    • https://cdn.sqhk.co/dodifufim/RgcOhdn/fan_of_guns_mod_apk_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/romemanir/nOtibii/netflix_serien_am_computer_en.pdfIn PDF document text
    • http://tevajevidiwa.22web.org/18801630091.pdfIn PDF document text
    • https://cdn.sqhk.co/posojuvapono/q7Vifie/8683883696.pdfIn PDF document text
    • http://electorat.org/pokemon_x_decrypted_rom_for_citra_androidk97w6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://mowumurukilada.rf.gd/77252041464.pdfIn PDF document text
    • http://wikevim.epizy.com/surah_al_waqiah.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/comcast_dvr_box_stuck_on_boot.pdfIn PDF document text
    • http://tawenaxogiminax.epizy.com/62763018361.pdfIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/attack_on_titan_season_3_english_dub_cast.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/40876217373.pdfIn PDF document text
    • http://rebefagor.epizy.com/how_to_hook_up_a_deltran_battery_tender.pdfIn PDF document text
    • http://zepibugab.rf.gd/frosty_the_snowman_piano_sheet_easy.pdfIn PDF document text
    • http://xovipofeguz.epizy.com/camouflage_pattern_template.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/nuwobife.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/78412005341.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00027708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27708 5000 bytes
SHA-256: 57c5c78d4c28b5d991f3e554e9ea7f6777399fc3f56be96a1a8670160ffc1d8e
font_01_sfnt_off00028816.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28816 13564 bytes
SHA-256: fabad0a6c10068b15301a9176d3b40538ff7c4ebdabc3c962b28bc4a716ec366
font_02_sfnt_off0002b325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B325 4324 bytes
SHA-256: 1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e

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