Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b2c322941e392f8…

MALICIOUS

PDF

70.0 KB Created: 2021-03-16 16:55:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: d0812eb5cf2f290a9ae00f207a02caa2 SHA-1: 0a1e01dce1ba8ae789220b26efcf425e0a9d205e SHA-256: 5b2c322941e392f813246c2a4f3003ae932d928f2fe5eb0f02dbea835fbe3b6b
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are associated with link farms and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though partially corrupted, contains a lure related to a 'Houston weather report tomorrow', which is likely used to entice users to click on the embedded malicious links.

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://soxebez.ru/123?utm_term=houston+weather+report+tomorrow PDF link annotation
    • http://ladekepevij.mygamesonline.org/life_changing_magic_of_tidying_up_crossword.pdfIn PDF document text
    • http://particulier-societegenerale.xyz/rename_full_package_name_in_android_studioemsrt.pdfIn PDF document text
    • http://lnstagram-helping-centre.com/13179630419ycbd9.pdfIn PDF document text
    • http://mon-compte-cmb.best/printable_free_gingerbread_man_short_story_printableod09a.pdfIn PDF document text
    • http://xufulop.iblogger.org/36809684109.pdfIn PDF document text
    • http://azorocheat5.xyz/linux_basic_networking_commandsev0oa.pdfIn PDF document text
    • http://reduslim-sito.site/what_is_steak_tartare_in_french8x1j9.pdfIn PDF document text
    • http://pasiworuwiwoz.getenjoyment.net/29747794233.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://pesafitibum.epizy.com/chinnamma_chilakkamma_meenaxi_song.pdfIn PDF document text
    • http://kageditivumimor.onlinewebshop.net/industrial_wastewater_treatment_systems.pdfIn PDF document text
    • http://nuxijezusuwep.rf.gd/emigrant_lake_fishing_report.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/phylum_basidiomycota_characteristics.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/odisha_rayagada_weather_report.pdfIn PDF document text
    • http://xolavozezimodan.onlinewebshop.net/what_do_the_different_color_boxes_mean_on_snapchat.pdfIn PDF document text
    • https://s3.amazonaws.com/dukavunivifa/hush_hush_book_synopsis.pdfIn PDF document text
    • http://tirevotijo.epizy.com/exit_interview_form_malaysia.pdfIn PDF document text
    • http://safadixuzet.rf.gd/members_mark_8_burner_event_grill_cover.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_off0000c982.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC982 4912 bytes
SHA-256: e0b473167969b393b391945e70cc37155e59fdd847ce8a2b84e2e58cb9c1be6b
font_01_sfnt_off0000da0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA0E 10288 bytes
SHA-256: 1336ebabb2a283a988a656c114b6aa3340700a2e5804f7759cf927f8640bd1ba
font_02_sfnt_off0000fcbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBD 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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