Malicious PDF — malware analysis report

Static analysis result for SHA-256 a276f4de7fcceb6a…

MALICIOUS

PDF

78.8 KB Created: 2021-03-25 05:44:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: c379e4610f1e126104c3cd4f5eb2502d SHA-1: 6138b1964a0bc69e28396fc47ec846ee0715eff3 SHA-256: a276f4de7fcceb6a160519386ad9dc9bf8a86243b595c599033980df7aaa8c0c
126 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URLs, with one pointing to 'ponafet.ru', suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the heuristic indicating a link farm on disposable hosting further support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://ponafet.ru/award?keyword=al+quran+tamil+translation+pdf PDF link annotation
    • http://fafuzum.sportsontheweb.net/vugazotovep.pdfIn PDF document text
    • http://gajelifuluxapov.mywebcommunity.org/98092690525.pdfIn PDF document text
    • http://zovolexune.sportsontheweb.net/rasigufirarazi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446038/normal_605a799096a8f.pdfIn PDF document text
    • http://zoxuruje.sportsontheweb.net/aimovig_package_insert.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415783/normal_6041e83ba4193.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480182/normal_6026ac386e52b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367300/normal_5febda9bc998b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xoxewunifas.epizy.com/alien_shooter_4._2._2_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a42832d-3314-4aa5-97e2-909234a8bb44/plot_of_pippi_longstocking.pdfIn PDF document text
    • http://wapofele.epizy.com/78241136435.pdfIn PDF document text
    • http://bividit.rf.gd/developmental_economics_books.pdfIn PDF document text
    • https://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_2c9a141a1f0e4cf885a9231ace8d458a.pdf?index=trueIn PDF document text
    • http://roniwixanedif.epizy.com/covid_assessment_results.pdfIn PDF document text
    • http://rejoxon.rf.gd/korean_grammar_check_naver.pdfIn PDF document text
    • https://ba85394b-11ac-4ca4-926b-74ca936c52e1.filesusr.com/ugd/5ccfc8_580022f6b80b4d2187f84abd1b70b8bf.pdf?index=trueIn PDF document text
    • http://ruxududomaba.epizy.com/95759877809.pdfIn PDF document text
    • http://sesisat.epizy.com/avp_alien_vs_predator_2004_movie.pdfIn PDF document text
    • http://kefasobodabaz.epizy.com/sindhu_bhairavi_tamil_video_songs.pdfIn PDF document text
    • http://tejizikadojuni.epizy.com/disturbed_sound_of_silence_vocal_sheet_music.pdfIn PDF document text
    • http://semagovolabak.rf.gd/dekajoboreluxudufo.pdfIn PDF document text
    • https://60f6da8c-824c-4163-aae9-6195f2ac7ed4.filesusr.com/ugd/7f16bd_48b91c5990b44390b73bf68d75be1d2e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/6eb1d6ca-7035-4714-a8a1-32feac7733f8/judirirosemazumipoduf.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E1 5300 bytes
SHA-256: d9c840bbb7b4ff1322d842ae32a9283b6e8fc6128738638a1f19f11edb3a347a
font_01_sfnt_off000108d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108D0 10972 bytes
SHA-256: 16b2d0ab2b5103190afc33a7a6a35083040a2f8030f2527ee7d194dca53d3fcd

Open this report in the interactive analyzer, or submit your own file for analysis.