Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5958bf9abd710b1…

MALICIOUS

PDF

75.6 KB Created: 2021-04-02 13:14:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0694d348050bc19cd7654cab38a230e9 SHA-1: 5aa92e51d9250975b31a5bc20d68f39eac36f6d7 SHA-256: f5958bf9abd710b1a459d01f1c5ff915b3c7ce19f9171ec1147b11a3729aaf83
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://bologen.ru/strik?utm_term=how+to+make+dunkin+donuts+coconut+caramel+iced+coffee PDF link annotation
    • http://gonzo-3d.com/is_behind_closed_doors_on_netflix49bn8.pdfIn PDF document text
    • http://marafonsport.site/44706186910ndqrp.pdfIn PDF document text
    • http://robertferrell.net/interrogative_adverbs_worksheet3ib4m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413845/normal_60165f65c99da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378857/normal_60192be86fe2d.pdfIn PDF document text
    • http://about-central.com/75313527200lulb7.pdfIn PDF document text
    • http://lakcherie.ru/973801829271n2cx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480758/normal_604eaf2cc0960.pdfIn PDF document text
    • http://jozipuvuwuzaj.mywebcommunity.org/verbos_irregulares_en_ingles_y_espaol_en_presente_y_pasado_simple.pdfIn PDF document text
    • http://espacecmb.xyz/analysis_of_categorical_data_with_r_bilderatdrm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422897/normal_6005a698c3dd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426815/normal_601d29dfe9e9c.pdfIn PDF document text
    • http://bonifacy.site/36567212278rqd9y.pdfIn PDF document text
    • http://storeplus.pro/89571248471wbt62.pdfIn PDF document text
    • http://creditpm.com/jawabkom_the_detailed_answer_dailypqsk8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cb8582fb-ab29-4f13-bfd4-623ca244ab52.filesusr.com/ugd/d61b30_58cfc34b4cca443aabbc18afc8163462.pdf?index=trueIn PDF document text
    • https://2ddc7431-ff91-46e9-9708-195efd6cc195.filesusr.com/ugd/ffe0d3_613a690c9bed4418a145fda28c668d46.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zalomi/beta_carotene_foods.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/5811823124.pdfIn PDF document text
    • https://68358877-4ee6-4e53-94f7-4bd9665c1f53.filesusr.com/ugd/3bbd68_2253a6d4f04445ce91c449c080679fb9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gisujubolidine/english_conversation_12.pdfIn PDF document text
    • https://9e1b5e4e-b4ab-405b-8fdf-b3b6d7b19c28.filesusr.com/ugd/94ea38_74465604509644698fb0a751f51e6fbe.pdf?index=trueIn PDF document text
    • http://dokudaruriwiv.atwebpages.com/catalogue_definition.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D0 5284 bytes
SHA-256: 308b86538c0050a034227f5329c7e254c1e25d11b204946540a96527501a0232
font_01_sfnt_off0000f9bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9BF 11468 bytes
SHA-256: 6f686490c641193d93cf14fb0cd25440991c83a385759b6ac49b3c4aefb077e2

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