Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a73d2afee7638a3…

MALICIOUS

PDF

97.2 KB Created: 2021-03-19 00:12:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: e73b9a42be2de71ea6af16529258527e SHA-1: 6498a836af508d796ce7c2d80def536e61f42012 SHA-256: 7a73d2afee7638a37520069e4e15f4e3650a2b391d6e9cde78b80e2c426faddb
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and is identified as a link farm on disposable hosting, indicating a strong intent to redirect users to potentially harmful sites. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to exploit users through deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://pelibifir.ru/award?keyword=buss+perry+aggression+questionnaire+short+form+pdf PDF link annotation
    • http://xukejufivakege.iblogger.org/8066580943.pdfIn PDF document text
    • http://dedarijaluwonu.22web.org/the_shining_1997_full_movie_youtube.pdfIn PDF document text
    • https://xigokujote.weebly.com/uploads/1/3/4/6/134649591/ff6aee.pdfIn PDF document text
    • https://bawilawuvibowe.weebly.com/uploads/1/3/4/4/134401702/6ba5089ba733.pdfIn PDF document text
    • https://wabezapodila.weebly.com/uploads/1/3/1/4/131437306/7583545.pdfIn PDF document text
    • http://suzamakulamuj.mypressonline.com/bopagitexugewurinemorodo.pdfIn PDF document text
    • http://penafur.scienceontheweb.net/fomididumopovige.pdfIn PDF document text
    • https://woluxubofij.weebly.com/uploads/1/3/1/3/131383763/zeguvelo.pdfIn PDF document text
    • http://xolokeminapi.getenjoyment.net/loralipufopokevakozap.pdfIn PDF document text
    • http://pugisapi.mypressonline.com/how_to_turn_on_power_wheels_dune_racer.pdfIn PDF document text
    • https://lazumuron.weebly.com/uploads/1/3/4/8/134863931/xidiro.pdfIn PDF document text
    • https://gurazelifu.weebly.com/uploads/1/3/0/8/130874247/zaziju.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zadosaw.epizy.com/rogoxopazol.pdfIn PDF document text
    • http://gurabagoderes.atwebpages.com/do_not_drink_wine_bible_verse.pdfIn PDF document text
    • http://wetiruri.epizy.com/diary_of_a_wimpy_kid_rodrick_rules_jeff_kinney.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03647f13-f38b-450b-b20e-2a2ecd83790e/2009_lexus_es_350_for_sale_near_me.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4355444c-146f-43c4-80b5-5f010133fc01/lolamikisim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e91171c-3099-48ec-a62f-299f347ae183/lexukimopezuzagubajafago.pdfIn PDF document text
    • http://wosidekole.rf.gd/how_to_buy_bitcoin_on_cash_app_2021.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/526eba2d-841e-4486-82e5-65ae216178dc/motorola_cp200xls_programming_cable.pdfIn PDF document text
    • http://wazozoludurisat.epizy.com/lezanirup.pdfIn PDF document text
    • http://surafupomef.epizy.com/96285065664.pdfIn PDF document text
    • http://movetodosewa.rf.gd/centos_6_commands_list.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001238c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1238C 5700 bytes
SHA-256: 8ddc18799c37bd142b4191469267270465c7fbf11ed50cc7bb46edcc09e72c83
font_01_sfnt_off000136ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136CA 12980 bytes
SHA-256: d906998822c021290d5b5707726e897fd2d37e5fe4e562b81af7b2bc1d9bfac6
font_02_sfnt_off00015f35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F35 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e