Malicious PDF — malware analysis report

Static analysis result for SHA-256 49a3a25b592fbe99…

MALICIOUS

PDF

76.1 KB Created: 2021-03-31 23:10:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5fdb7030dc9092190fea045bf35ddfbe SHA-1: 5a88f9ce524bcc0151f9e7cf0fcf0ed7a39edefe SHA-256: 49a3a25b592fbe99651d030fa9a48ee1db2efd15ad98ce7fce6d0eae84afc2f5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9993

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://zajinet.ru/123?utm_term=labels+staples+template PDF link annotation
    • https://cdn.sqhk.co/rovifatira/gijibgf/rufufuviwot.pdfIn PDF document text
    • http://datovufes.scienceontheweb.net/57097103727.pdfIn PDF document text
    • https://cdn.sqhk.co/pekebugus/je7jjcZ/29500633889.pdfIn PDF document text
    • http://najelipopusivut.getenjoyment.net/pedemile.pdfIn PDF document text
    • http://vazagitomis.mypressonline.com/islamic_baby_names_with_meaning_in_tamil_download.pdfIn PDF document text
    • http://fanutoragozogow.sportsontheweb.net/what_do_gypsy_moth_caterpillars_eat.pdfIn PDF document text
    • http://defokozixeral.sportsontheweb.net/after_the_love_has_gone_chords.pdfIn PDF document text
    • http://bawilidow.mypressonline.com/all_maths_formulas_class_12.pdfIn PDF document text
    • https://cdn.sqhk.co/zuzipogowita/dewgcge/ponezakasufe.pdfIn PDF document text
    • http://mufinofol.scienceontheweb.net/international_accounting_standards_1.pdfIn PDF document text
    • http://rejasikega.scienceontheweb.net/sonic_sausage_breakfast_toaster_nutrition_value.pdfIn PDF document text
    • http://fusizexa.22web.org/ascariasis_tratamiento.pdfIn PDF document text
    • http://nomudepalak.medianewsonline.com/24939536663.pdfIn PDF document text
    • https://cdn.sqhk.co/zanivuwiduvo/ggozpqd/jbl_music_system_price_in_dubai.pdfIn PDF document text
    • http://winovigamaj.mygamesonline.org/samsung_tv_service_menu_with_smart_remote.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://famomijis.onlinewebshop.net/lumbar_disc_prolapse_exercises.pdfIn PDF document text
    • http://rirasufo.epizy.com/paro_cardiaco_definicion.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a32ec7a-60af-4460-a39d-020d2e84371b/lenovo_t420_drivers_for_windows_7_32_bit_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a0d7d67-b028-4cef-9761-91cfb4c5cdf1/warriors_dont_cry_summary_chapter_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83a76e89-ee76-4d44-bf89-6ec64f905604/cuisinart_keurig_coffee_maker_ss-700.pdfIn PDF document text
    • http://xobiluwova.epizy.com/3245073055.pdfIn PDF document text
    • http://mapumitowa.rf.gd/biblical_significance_of_the_number_803.pdfIn PDF document text
    • http://pogetowem.onlinewebshop.net/milobesonixije.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_off0000ecb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB2 4952 bytes
SHA-256: 9fa19049dca52b39cdd2d5fd47285642a40129ce54f98e4338d23e5ec54f1503
font_01_sfnt_off0000fd72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD72 11100 bytes
SHA-256: 332e3dcbb2456f6a044d569da760cdbcc46f35de7b96d71ab0cafc2cdaa72441

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