Malicious PDF — malware analysis report

Static analysis result for SHA-256 f38679eb2fc542dc…

MALICIOUS

PDF

82.8 KB Created: 2021-03-21 01:15:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 965967c313d68452bc6ecfdd1dde7bb3 SHA-1: 171705ee360f98e2a1ac1587739317c9ee257320 SHA-256: f38679eb2fc542dcd57e17d869e130c0b754effe633e64013bef48cbf5099279
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jacksth.ru/aws?utm_term=brene+brown+first+ted+talk+shame PDF link annotation
    • http://denizan.com/76152520531dhi90.pdfIn PDF document text
    • http://avto-trokot.xyz/predator_2000_inverter_generator_manualakrne.pdfIn PDF document text
    • https://cdn.sqhk.co/togixulala/abgjTRa/telogibifusovunukotonelu.pdfIn PDF document text
    • https://cdn.sqhk.co/matikefateri/fPr7jjS/44177914369.pdfIn PDF document text
    • http://tricitysikhs.com/sony_receiver_str-ks360_manualb8t81.pdfIn PDF document text
    • https://cdn.sqhk.co/rujamuzizogo/hdhodjd/calculator_app_program_in_android_studio.pdfIn PDF document text
    • http://legalvictory.group/11560792796z6y30.pdfIn PDF document text
    • http://akvatehnika74.ru/biopsy_report_of_breast_cancerfy5li.pdfIn PDF document text
    • https://cdn.sqhk.co/ruzemesafe/CdicMhi/wejanexufe.pdfIn PDF document text
    • https://cdn.sqhk.co/febapaji/hb657gY/majili_telugu_audio_songs_naa_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/tajugajobib/cVZhEut/planet_fitness_membership.pdfIn PDF document text
    • https://gepobuxew.weebly.com/uploads/1/3/1/0/131070920/bewatofotewaxo_padusukes_xiniji_zosizidubap.pdfIn PDF document text
    • http://mscgis.net/el_abecedario_en_espaol_para_niosd5twl.pdfIn PDF document text
    • https://regofixaf.weebly.com/uploads/1/3/5/3/135318676/nobelutaw.pdfIn PDF document text
    • http://momentikshop.space/what_page_is_the_third_step_prayer_on_in_the_aa_big_bookucklu.pdfIn PDF document text
    • http://vivadoctor.ru/tumejugababedutemds8u8.pdfIn PDF document text
    • https://sitakubijilu.weebly.com/uploads/1/3/0/7/130776110/98f189610.pdfIn PDF document text
    • https://cdn.sqhk.co/libavesonon/gih2ghs/cfa_level_1_mock_exam_2014.pdfIn PDF document text
    • http://wersita.space/38584023056dfkk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bb74f61c-7045-47bf-9a7e-968101ee373e.filesusr.com/ugd/81ef4b_14c77e4ab5b74222b068e366e9498243.pdf?index=trueIn PDF document text
    • https://1eb42bdc-3da6-4b32-b75f-4382f1721f8e.filesusr.com/ugd/35474d_24605a7840a7454facd4b2f05b50cd4b.pdf?index=trueIn PDF document text
    • https://45f61934-b4a1-4335-a9e3-e142d9465b5b.filesusr.com/ugd/0dd040_b204a0805d0b4bc2a9ff4e94a59aa46b.pdf?index=trueIn PDF document text
    • https://cad90261-f038-4e8a-b384-2e0e37e6cb8c.filesusr.com/ugd/4c4e45_4ca6d398f445409f848a750fc714e7d4.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10532 5492 bytes
SHA-256: 75a639ceea19023108e9fd60cc74a5f3fd8387eebc2fc493a6aabc4336644ef9
font_01_sfnt_off000117ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117CE 10620 bytes
SHA-256: 6993a9e155d3e9c8c0c8227edfb23119db185ec89c7fadc0af40114eca63faa0

Open this report in the interactive analyzer, or submit your own file for analysis.