Malicious PDF — malware analysis report

Static analysis result for SHA-256 d49a62b62f5e1801…

MALICIOUS

PDF

82.4 KB Created: 2021-03-11 09:14:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 5852366f4cbef3c38f08f4c8ba2dee94 SHA-1: 473abe3736cc9cd497d9b8981216d2a1b441f9a6 SHA-256: d49a62b62f5e1801056b13307acd42ff4202d4aaa430d2f6108108107ddc779e
126 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, many pointing to disposable domains, indicating a link farm designed to redirect users. The presence of embedded URLs and the heuristic identifying it as a link farm strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

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://ponafet.ru/strik?utm_term=can+psychopaths+have+empathy PDF link annotation
    • http://vizenam.medianewsonline.com/les_miserables_song_lyrics_bring_him_home.pdfIn PDF document text
    • http://helpcreditscore.info/duromax_generator_12000ewvyls.pdfIn PDF document text
    • http://pejelurim.getenjoyment.net/michael_vey_books_reading_level.pdfIn PDF document text
    • http://energierecrute-emplois.com/identifying_logical_fallacies_worksheet_answersjf2t2.pdfIn PDF document text
    • http://taxevidel.medianewsonline.com/microsoft_word_2016_free_download_full_version_32_bit.pdfIn PDF document text
    • http://helpcenter.business/calligraphy_writing_a_to_z_for_beginnersjqmly.pdfIn PDF document text
    • http://saxobupazes.sportsontheweb.net/gomimuv.pdfIn PDF document text
    • http://pogawubujogeje.mypressonline.com/deminupolapel.pdfIn PDF document text
    • http://paktum.pro/xilupezowanig218a.pdfIn PDF document text
    • http://digtalcaliper09.xyz/organizacion_social_de_la_edad_medialdz41.pdfIn PDF document text
    • http://geosen.net/farming_simulator_16_ps_vita_guidenust2.pdfIn PDF document text
    • http://mastericy-chistoty.ru/21844029564mlkfm.pdfIn PDF document text
    • http://puvepum.getenjoyment.net/is_there_a_new_roku_coming_out.pdfIn PDF document text
    • http://nextauto02.ru/6537039742650efx.pdfIn PDF document text
    • http://nenonazuf.scienceontheweb.net/wagubemuvu.pdfIn PDF document text
    • http://tigibisolefora.mygamesonline.org/aristotele_filosofia.pdfIn PDF document text
    • http://copyright-help-report.com/what_does_a_void_mean_in_law2jg8o.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://durenifujogax.myartsonline.com/45948676736.pdfIn PDF document text
    • https://03df18d0-0a94-4077-8b44-1f3cf8b7c870.filesusr.com/ugd/23a6c3_f13632a6ae2149b8baec5ef22e6abde2.pdf?index=trueIn PDF document text
    • http://fonezitugomal.rf.gd/bohairic_grammar.pdfIn PDF document text
    • http://konenaku.rf.gd/bofewavomubibubegede.pdfIn PDF document text
    • http://xitutudatiri.epizy.com/brahmastra_songs_free.pdfIn PDF document text
    • http://voxosejak.rf.gd/free_powerpoint_cycle_diagram_template.pdfIn PDF document text
    • https://72858ab8-d36f-4bc2-b208-e5ec56e76d01.filesusr.com/ugd/3a4e0e_030678d855ff43d69194f3e30aa99efe.pdf?index=trueIn PDF document text
    • http://konazosite.epizy.com/bangla_english_grammar_book_free_download.pdfIn PDF document text
    • https://84d5b3ab-51dd-4312-87b7-51df18fb3b26.filesusr.com/ugd/9ea9b6_995a15a0f4c54b31b9864a633e449d7e.pdf?index=trueIn PDF document text
    • https://ddb0fe67-a09a-413d-b59a-c21b1dde3186.filesusr.com/ugd/3f0e57_664f671b3780491087be67a2de1201c9.pdf?index=trueIn 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_off0000f7e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7E0 4968 bytes
SHA-256: 204483ded96d86234bfa31e667941b8aa589f1fdc28101c1911636686a123c83
font_01_sfnt_off000108a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A2 10864 bytes
SHA-256: 6b507fd63a9406722c7274cdfc59f7d7186f798d70acb33bf52a104ef65c915f
font_02_sfnt_off00012d93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D93 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71