Malicious PDF — malware analysis report

Static analysis result for SHA-256 883af50e4c757456…

MALICIOUS

PDF

78.2 KB Created: 2021-03-27 23:24:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e1d381a48890ccf1ef7438d5efcf1dae SHA-1: 362426a4ea4742faf1c068318520250415b43278 SHA-256: 883af50e4c75745652e95d2c6447d9215e8669b77c8604908183410b361b2f30
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1190 Exploit Public-Facing Application T1203 Exploitation for Client Execution

The PDF document exhibits characteristics of an advance-fee scam, including language related to lotteries, prizes, and parcel delivery requirements. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous external URLs, many pointing to disposable hosting or link farms, further supports the phishing and scamming nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://leonvi.ru/123?utm_term=game+playdead+inside+apk+android
    • http://mivetys.xyz/will_there_be_a_season_3_of_pokemon_sun_and_moon_on_netflixsooe1.pdf
    • http://psyhologrzn.ru/kidoxelonamapssl07.pdf
    • https://cdn-cms.f-static.net/uploads/4388814/normal_60354532632a5.pdf
    • http://copyrightmediahelp.com/netulatopkvfep.pdf
    • http://lnstagramcopyrightservices.org/98249685222p6uzf.pdf
    • https://static.s123-cdn-static.com/uploads/4376382/normal_60086ce74ac34.pdf
    • http://noxesim.iblogger.org/check_grammar_and_sentence_formation_online.pdf
    • https://static.s123-cdn-static.com/uploads/4380079/normal_5fee193305fda.pdf
    • https://static.s123-cdn-static.com/uploads/4499999/normal_5fe24ca5db2e5.pdf
    • http://dalnoboyi.xyz/jujitewitmwtv.pdf
    • http://summ-green.fun/what_are_some_easy_topics_to_write_abouth9plq.pdf
    • https://cdn-cms.f-static.net/uploads/4495393/normal_60292577e0dd6.pdf
    • http://wowitaly.pro/4_band_resistor_colour_code_value_calculatordfkuf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://jilagikudi.rf.gd/format_sqlplus_output_in_shell_script.pdf
    • https://uploads.strikinglycdn.com/files/74e9c3c6-95d6-4739-a3ec-650042884e6d/60310672300.pdf
    • http://fumutomuwe.epizy.com/best_microwave_hood_combo.pdf
    • https://s3.amazonaws.com/zobuwubedak/20787574835.pdf
    • https://uploads.strikinglycdn.com/files/894af1e9-25d2-4bfe-ab40-573d1c321ce4/how_can_i_tell_if_my_furnace_ignitor_is_bad.pdf
    • https://uploads.strikinglycdn.com/files/9ee1fc6c-b3c1-4e42-910d-d4bfe00a09f3/what_is_the_purpose_of_1987_philippine_constitution.pdf
    • http://vedaremix.epizy.com/kannada_books_online_free.pdf
    • https://s3.amazonaws.com/falevi/axel_springer_annual_report_2018.pdf
    • https://uploads.strikinglycdn.com/files/23e6ccc1-171a-42f9-94bd-d5880fdf1d2e/57015847197.pdf
    • http://kezepinaxozegom.epizy.com/jotosabamomilure.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_off0000f244.bin
259385da2b5a726512d96dd908315ed825b602c8a1342945e0e086c7fd00f685		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF244 5300 bytes
font_01_sfnt_off00010446.bin
649e5659b2c03aba3a68741dbc8c54fb57e806343014264723dbe2514262cb02		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10446 11256 bytes

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