Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c8d001109fb467e…

MALICIOUS

PDF

88.4 KB Created: 2021-03-12 16:21:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: cecdeeaf63c3a0b7954801dd3ca361a7 SHA-1: d036fe529c48c7af9bf186c6d57c5165796b5168 SHA-256: 8c8d001109fb467ef54a9030ab89a9253721a12cfdccb3f79df608014e277ce7
126 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URLs, with several hosted on disposable domains, suggesting a link farm or phishing lure. The PDF structure and embedded content, though obfuscated, point towards an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://jottigo.ru/award?keyword=ain+t+i+a+woman+revisiting+intersectionality+pdf PDF link annotation
    • http://iwhite.space/86284976782bqrua.pdfIn PDF document text
    • http://natgood.space/how_to_say_french_words_correctlyod7zn.pdfIn PDF document text
    • http://hookup756.fun/xakinowunaxub1hyqc.pdfIn PDF document text
    • http://gratoramm.website/can_python_be_used_for_data_analysishplgc.pdfIn PDF document text
    • http://neuroncraft.online/how_do_i_turn_off_demo_mode_on_sony_bravia_tv_without_remoteib49m.pdfIn PDF document text
    • http://italywom.space/excel_vba_change_message_box_titleh66l9.pdfIn PDF document text
    • http://modezewop.mygamesonline.org/d_d_5e_character_sheet_writable.pdfIn PDF document text
    • http://nazhivy.net/30519221754rmvs4.pdfIn PDF document text
    • http://axecheat6.xyz/45315955717j3kcs.pdfIn PDF document text
    • http://nopuvobetag.mygamesonline.org/bikexitozepajelofapeti.pdfIn PDF document text
    • http://xufuzema.sportsontheweb.net/52906715277.pdfIn PDF document text
    • http://bufo.online/jutowoxibkv29t.pdfIn PDF document text
    • http://segway-wheelchair.ru/how_to_get_my_shark_steam_mop_to_work9ktei.pdfIn PDF document text
    • http://fupemagis.mywebcommunity.org/lufelu.pdfIn PDF document text
    • http://particulieres-societegenerale.best/social_media_content_plannerc6ov1.pdfIn PDF document text
    • http://studyweb.site/40229444176js5r1.pdfIn PDF document text
    • http://helplnstagramcontact6088758.com/mitowurapurof41tqy.pdfIn PDF document text
    • http://rodisawikikofu.medianewsonline.com/dutin.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mefovu/capacitor_voltage_derating_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/brawl_stars_mod_apk_version_16._176.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/100_aos_de_soledad_primera_frase.pdfIn PDF document text
    • https://s3.amazonaws.com/ropidadegaxut/leruwe.pdfIn PDF document text
    • http://noroved.myartsonline.com/14503335717.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_off00011cba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CBA 5716 bytes
SHA-256: 5577b84cab11b9841a65db4f9da6f2ef5f9d8ce6bf0cb71291c36fd54da48751
font_01_sfnt_off0001303d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1303D 10484 bytes
SHA-256: 95a1f836aabb007b064c3fd2e1f2494f7b94c65cee09fb685ba2aa98d58be7d2

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