Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b22c9b95b4ff1ea…

MALICIOUS

PDF

85.8 KB Created: 2021-03-20 19:23:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 267f358cc035c43e2922379569b6b980 SHA-1: 109be5ee0a02292c68e8ff4517e60224a0c205a4 SHA-256: 5b22c9b95b4ff1eaa1295be56e286b122b336793c5282c95d6a535769107f650
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 0.9995

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://druttle.ru/award?keyword=circulacion+feto+placentaria+pdf PDF link annotation
    • https://repawuwo.weebly.com/uploads/1/3/5/3/135313919/6326452.pdfIn PDF document text
    • http://pristav.pro/2007_dt466_injector_replacementuuad9.pdfIn PDF document text
    • https://vejarava.weebly.com/uploads/1/3/1/0/131070596/7e719420f0c809.pdfIn PDF document text
    • https://xuduwenonotowud.weebly.com/uploads/1/3/1/3/131379268/4778078.pdfIn PDF document text
    • http://xirapanagix.getenjoyment.net/taj_mahal_information_in_urdu.pdfIn PDF document text
    • http://shortsomfj.space/sipimulonapuginupub9nlvy.pdfIn PDF document text
    • http://cookwellbakewell.com/7236328445011q33.pdfIn PDF document text
    • https://revasarubon.weebly.com/uploads/1/3/5/2/135295272/tuwasa.pdfIn PDF document text
    • http://alsamcctv.com/modes_of_documentary_nicholstvffk.pdfIn PDF document text
    • http://save50.pro/the_chrysalids_summary_chapter_14744q0.pdfIn PDF document text
    • http://static-start.top/what_grade_is_magic_tree_house_fori0gia.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/96492166-f824-430e-8228-208d649747e1/79269218387.pdfIn PDF document text
    • https://s3.amazonaws.com/punurum/jabozovaropepawik.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88719230-582a-4fd1-a8e3-48fafd8ee19a/paragraph_of_the_week.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/schwinn_biodyne_250_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9427fce-055d-4b3c-ac3a-9c4477e5d578/tesuguvojezobuwakaben.pdfIn PDF document text
    • https://s3.amazonaws.com/wiwamoxamo/bioteknologi_bioremediasi.pdfIn PDF document text
    • https://s3.amazonaws.com/pojikovewijeja/druid_spell_sheet_5e.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2fe4f89e-04ec-48ae-a409-279ed60093c7/minuponufelofawobi.pdfIn PDF document text
    • http://foxukekamusun.onlinewebshop.net/jajanabozerululigu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e7a1bb7-dfbf-4a20-b579-ced396d793ba/48396341748.pdfIn PDF document text
    • http://vigavanoxe.onlinewebshop.net/racquetball_rules.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fd6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6B 4876 bytes
SHA-256: 452ed5aa7f305842fafe93b229cc8ebba0c8cc77c7a8c27a461dc3faa892aa09
font_01_sfnt_off00010e10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E10 11116 bytes
SHA-256: 2c9af6c91360a98b0044f308cf84cdc5970cea4ae19bf66cf25b14150939e6ec
font_02_sfnt_off00013293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13293 16204 bytes
SHA-256: 532315dfdc59b350d447ad91845dd8cc72a836e684f536ab9a4305dc5b53fb8e

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