Malicious PDF — malware analysis report

Static analysis result for SHA-256 19ef200c48d5933e…

MALICIOUS

PDF

77.3 KB Created: 2021-03-04 07:57:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 57e91ebcc6169708adfb33edcaba392a SHA-1: 90a2e85f801a8f84fa3c30b5a79d3fd18a3ff53b SHA-256: 19ef200c48d5933e8c6287fa0fd86850600d34ddef68f4cc58012b45691ddb00
126 Risk Score

Malware Insights

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

The PDF contains multiple external URIs, with one specifically mimicking a search result to trick users into visiting a malicious domain. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the embedded URLs suggest the primary attack vector is directing users to external malicious content.

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://seumenha.ru/123?utm_term=how+would+you+describe+a+ice+storm+power+outage PDF link annotation
    • http://kepajawidar.22web.org/form_reg_138.pdfIn PDF document text
    • https://cdn.sqhk.co/lopedovev/hfC6ic9/tupazilazuzizuf.pdfIn PDF document text
    • http://bevaxifiro.22web.org/gapudixelilarepimovizigav.pdfIn PDF document text
    • http://afracheat9.xyz/diy_explosion_box_templatesm2q1j.pdfIn PDF document text
    • https://cdn.sqhk.co/koporikog/5eDhhph/oxenfree_game_switch.pdfIn PDF document text
    • https://cdn.sqhk.co/sobekalob/agdgcEG/vuwumopakemesigolugeri.pdfIn PDF document text
    • http://suzamakulamuj.mypressonline.com/log_bar_table_and_chairs.pdfIn PDF document text
    • https://cdn.sqhk.co/vakanaju/jggTjfm/tropical_fish_oscar_tank_mates.pdfIn PDF document text
    • https://cdn.sqhk.co/jakadamalate/qjfaNjh/14784629943.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390642/normal_5fedfd85501d1.pdfIn PDF document text
    • http://katipef.medianewsonline.com/how_long_do_beats_solo_last.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://pidodexogejax.myartsonline.com/74646746737.pdfIn PDF document text
    • http://gogejovuxog.epizy.com/fukilexeremepakenu.pdfIn PDF document text
    • http://xuvotawelotito.epizy.com/41109957859.pdfIn PDF document text
    • http://fiforeru.atwebpages.com/913595954.pdfIn PDF document text
    • http://nedizilunok.myartsonline.com/4273013711.pdfIn PDF document text
    • http://jupetovujek.epizy.com/grammar_worksheet_for_grade_5.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_off0000e3c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C0 5464 bytes
SHA-256: 226b426b69c82c7e5f0410fb08ff0558fb69eafc25dd01789f97e61a6505587c
font_01_sfnt_off0000f669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF669 10288 bytes
SHA-256: 8583d99717a13eb70655d41225f9ac5381363d4ab6111a364ca0184ce9cb3e45
font_02_sfnt_off000119a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119A5 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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