Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed07ec6511de0339…

MALICIOUS

PDF

88.7 KB Created: 2021-03-11 15:18:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 39570fc6d631a211366ba0c339524dfd SHA-1: 55e2f78b3f5010b70270cfe6fdf909b3e9aa6c2d SHA-256: ed07ec6511de03397b01fa9a5fcdb3519a1dbe3d24558d5d2d99daa090efa648
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-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://kuzutuzo.ru/aws?utm_term=gilbert+and+gubar+madwoman+in+the+attic+jane+eyre PDF link annotation
    • https://cdn.sqhk.co/koroxofusino/iahaSge/20665445275.pdfIn PDF document text
    • https://cdn.sqhk.co/fobonelaga/ia7ihjg/supposed_to_synonym.pdfIn PDF document text
    • http://pakirekugep.scienceontheweb.net/pablo_neruda_famous_poems_in_malayalam.pdfIn PDF document text
    • https://cdn.sqhk.co/muwazubivotu/jiNjd7h/33399511588.pdfIn PDF document text
    • http://reloturuvum.22web.org/scut_work_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/gabotewobe/hebA2if/amec_foster_wheeler_pension_plan_annual_report.pdfIn PDF document text
    • https://cdn.sqhk.co/dugelabomaw/jcJjghe/paycell_kart_ne_kadar.pdfIn PDF document text
    • https://cdn.sqhk.co/mewixamok/idvghe2/31433772607.pdfIn PDF document text
    • https://cdn.sqhk.co/dowotovewi/dgjggwR/delta_international_flight_boarding_time.pdfIn PDF document text
    • http://rokamik.iblogger.org/discovery_turbo_max_tv_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/zatejurix/thhhige/xevenob.pdfIn PDF document text
    • http://wusozupu.mypressonline.com/advanced_java_programming_tutorial_point.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/027d8789-50f4-4c42-a67f-9d21903426f4/how_to_make_a_ping_pong_game_in_java.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de260517-3488-4305-8362-4c6abe64a07d/blender_lessons_free.pdfIn PDF document text
    • http://sojufuka.atwebpages.com/91065855590.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/253d80c1-d999-4a6e-a5f1-908bdfc31a6a/htc_1_m8_screen_replacement.pdfIn PDF document text
    • http://kofaxafogi.myartsonline.com/ledasovasiseza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/acca083b-22cb-4eca-b63c-4a1b528c6a74/75697297311.pdfIn PDF document text
    • http://babotos.epizy.com/memorandum_of_understanding_sample_template.pdfIn PDF document text
    • http://visugog.myartsonline.com/what_does_sg_mean_in_golf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf24f9df-d8b2-4f7d-9757-1cfb29e54149/la_casa_de_los_espiritus_pelicula_elenco.pdfIn PDF document text
    • http://kepinud.rf.gd/sujejelebukokowan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43d9648c-050c-4981-b15f-6722ea262072/gusazunasidex.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_off00011c96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C96 5616 bytes
SHA-256: 5f3eb0e8938e160ce5f1c095758e7fc774502fa602ef9343e2619fb40b499f96
font_01_sfnt_off00012fa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FA1 10324 bytes
SHA-256: a7f987872525e43f6adf4dd797099694a0e765e5c0a63e34809341000d944f5b

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