Malicious PDF — malware analysis report

Static analysis result for SHA-256 705a53e1539a6c58…

MALICIOUS

PDF

86.0 KB Created: 2021-03-19 09:19:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 2d5115eb75555a6b513d7990c16b44ae SHA-1: b81bf4a0a4e399b793d46eb8fd3860fc3bfe731a SHA-256: 705a53e1539a6c5850dbc9876f7bb758aabd91dabbfbd4a491ae31ed57781fcb
134 Risk Score

Malware Insights

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

The file is a PDF that has been flagged by multiple heuristics, including ML classification and ClamAV, as malicious and phishing-related. The presence of external URIs and a link farm heuristic suggests an attempt to redirect users to malicious websites. The document body, though heavily obfuscated, contains text that, when combined with the 'SE_URGENCY_LURE' heuristic, indicates a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://seumenha.ru/wix?keyword=spot+hogg+sight+tape+pdf PDF link annotation
    • http://pupezawat.scienceontheweb.net/balance_of_payment_book.pdfIn PDF document text
    • http://fajesamosini.sportsontheweb.net/lemepe.pdfIn PDF document text
    • http://jixewelo.scienceontheweb.net/how_to_cook_a_whole_chicken_in_air_fryer_oven.pdfIn PDF document text
    • http://gerododuxokamid.iblogger.org/bahu_begum_full_movie_hd.pdfIn PDF document text
    • http://veviwumifuvemuz.mypressonline.com/lexusetavizix.pdfIn PDF document text
    • http://bukapim.mywebcommunity.org/49060427993.pdfIn PDF document text
    • http://dosubodanes.mypressonline.com/are_cast_iron_weights_safe.pdfIn PDF document text
    • http://tufuwavaziga.mygamesonline.org/what_is_the_average_income_in_the_us_2020.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
    • https://s3.amazonaws.com/dujepav/zilajodutenavetop.pdfIn PDF document text
    • https://s3.amazonaws.com/fadobirak/audio-technica_at-lp60xusb-gm.pdfIn PDF document text
    • https://5ee0d2ad-6486-47ce-ab7d-0e7b2bae4193.filesusr.com/ugd/bc0d1e_db12f828c6b04a579667363f8d8621fb.pdf?index=trueIn PDF document text
    • http://nopawalaxuwaw.onlinewebshop.net/ejercicios_notacion_cientifica_matematicas_3_eso.pdfIn PDF document text
    • http://fadifisevak.epizy.com/piano_songs_sheet_music_free.pdfIn PDF document text
    • http://bafemiw.epizy.com/arquitectura_moderna_desde_1900.pdfIn PDF document text
    • https://s3.amazonaws.com/sojuravewi/mezaxaxemekoropebogegoz.pdfIn PDF document text
    • http://tibutariwu.myartsonline.com/62209585708.pdfIn PDF document text
    • http://gazemaj.epizy.com/duzelekutajovabitow.pdfIn PDF document text
    • http://patudesaruvob.atwebpages.com/38226083811.pdfIn PDF document text
    • https://s3.amazonaws.com/lopadivupudexa/esl_emotions_vocabulary_worksheets.pdfIn PDF document text
    • http://winivufada.epizy.com/aadhar_card_address_change_form_by_post.pdfIn PDF document text
    • http://romofimor.onlinewebshop.net/18700363899.pdfIn PDF document text
    • https://d6d3a1c5-32ce-46e9-ae92-c5b8d84d65d9.filesusr.com/ugd/a3b54b_4d95d969c5fe43f490ee08be0b710265.pdf?index=trueIn PDF document text
    • https://85fc0914-20e3-4f1c-be8c-de7e6f89f47e.filesusr.com/ugd/a44510_c631024455d043e4b8c3c98c2c91be45.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_off000102a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A6 4960 bytes
SHA-256: dc40b369d12a62f5fea53444c01ba7a240fa26112af950472f3c907f56934b18
font_01_sfnt_off00011398.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11398 12364 bytes
SHA-256: 5fabfec653f33940fd1ad69401836472beede215dbd635211522f9de25516f35
font_02_sfnt_off00013bf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BF0 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361