Malicious PDF — malware analysis report

Static analysis result for SHA-256 6edf9925060d51f0…

MALICIOUS

PDF

80.6 KB Created: 2021-03-23 12:19:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: d3ce9b3e97b693b69822c4c0e99c01e1 SHA-1: 65c8b1208b3e315b3536a7f654a82bcbc7a492bb SHA-256: 6edf9925060d51f0ce76ea28a3d334e5201cdacb4a713982ff2d9bf77bbec6be
166 Risk Score

Malware Insights

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

The sample is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a link farm PDF. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a phishing or malware distribution attempt. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document may be part of a multi-stage attack involving password-protected archives.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/123?utm_term=buscar+mi+celular+android PDF link annotation
    • http://wirelessinfo.ru/jimamotosotugapaxescb33.pdfIn PDF document text
    • http://websecurer.tech/59347368657vyikm.pdfIn PDF document text
    • http://kufafukedexepix.mygamesonline.org/gapowuruparowoxapebafij.pdfIn PDF document text
    • http://pro-komp-master.website/el_amor_en_los_tiempos_del_colera_ver_online_latinoo5i2x.pdfIn PDF document text
    • https://cdn.sqhk.co/sesijisova/dz9ibEC/tanedopowolizaj.pdfIn PDF document text
    • http://kittyplay.online/science_experiment_coloring_sheetshjajo.pdfIn PDF document text
    • https://cdn.sqhk.co/zoluxoni/jcWYhiA/3143403911.pdfIn PDF document text
    • https://cdn.sqhk.co/pixukinoma/cl0iikr/movie_music_ringtones_telugu.pdfIn PDF document text
    • http://baderezu.scienceontheweb.net/physiology_of_respiration_in_human.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413012/normal_6058498fec3b1.pdfIn PDF document text
    • http://lovemecompletely.com/is_melaleuca_a_reputable_company00310.pdfIn PDF document text
    • http://tisiner.iblogger.org/fesiwavavogar.pdfIn PDF document text
    • http://dofujifeluradep.medianewsonline.com/fitbit_flex_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/soleximu/gehbjcf/budget_2018_highlights_upsc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408878/normal_6024a36966ada.pdfIn PDF document text
    • http://bazodifufibi.22web.org/weekly_lesson_plan_template_free.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://pimoxonevuwewax.atwebpages.com/is_typing_45_wpm_good.pdfIn PDF document text
    • https://s3.amazonaws.com/kotidox/lakifaxivige.pdfIn PDF document text
    • http://puwadokemizogu.epizy.com/les_diffrents_types_d_amputations.pdfIn PDF document text
    • https://s3.amazonaws.com/jugobimuraje/xemebupiziz.pdfIn PDF document text
    • http://miseparasunafit.rf.gd/xumix.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/does_old_navy_have_maternity_section_in_store.pdfIn PDF document text
    • https://s3.amazonaws.com/benubapopikaj/7776186373.pdfIn PDF document text
    • http://soranodabiwegi.myartsonline.com/taylor_weight_scale_7209w_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/12486793885.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_off0000ef27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF27 4936 bytes
SHA-256: 3dc8f78d6dd5c23066c003b6034fbc6b431857a60ec803fefc9de220db3461f7
font_01_sfnt_off0000ffbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBE 11324 bytes
SHA-256: 82045c19ded9f60f1cb6890a41be59b66480e114b077eab31d2f72625ba2be34
font_02_sfnt_off000124f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124F4 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176