Malicious PDF — malware analysis report

Static analysis result for SHA-256 285dd1b408038660…

MALICIOUS

PDF

81.7 KB Created: 2021-03-21 02:36:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 6b35939495958964b6bea83a7b2a94fd SHA-1: 5125ff44d81514fe41b8001a5a27ea4f9398282d SHA-256: 285dd1b40803866048f2dfe3c5992ec094f0332c30009cad7566a3604dcddef0
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9991

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/wix?keyword=used+car+buying+guide+reddit PDF link annotation
    • https://vurabagugodemox.weebly.com/uploads/1/3/1/1/131164039/414809.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492294/normal_604e8f739e01b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379229/normal_5fc67da9cb3a6.pdfIn PDF document text
    • http://zenododuro.iblogger.org/how_to_help_with_gas_during_pregnancy.pdfIn PDF document text
    • https://gatojodegapov.weebly.com/uploads/1/3/1/6/131637656/netonadetinepo-kapap-lutipurefixo-zovasuwukimoje.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373779/normal_6000dac154b9c.pdfIn PDF document text
    • https://remewizefo.weebly.com/uploads/1/3/1/8/131856163/koriz-kedutababojile.pdfIn PDF document text
    • https://nedosadowizo.weebly.com/uploads/1/3/5/3/135347652/pokenijugojagelos.pdfIn PDF document text
    • http://jibitivi.66ghz.com/64616704385.pdfIn PDF document text
    • https://mavipevawifuduv.weebly.com/uploads/1/3/4/5/134598931/2369885.pdfIn PDF document text
    • https://kasapumaf.weebly.com/uploads/1/3/1/3/131397987/bemikav.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406455/normal_5feef236d570b.pdfIn PDF document text
    • http://reniloze.iblogger.org/navelebetumavagonejuno.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zatasipezeg/wopimovojam.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/62872072389.pdfIn PDF document text
    • https://s3.amazonaws.com/nuxomigo/onion_root_tip_mitosis_lab_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/analytical_report_ideas.pdfIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/calendario_rusia_2018_hora_colombia.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/pesozoxi.pdfIn PDF document text
    • http://lodaxiku.rf.gd/59269889157.pdfIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/brighthouse_financial_life_insurance_surrender_form.pdfIn PDF document text
    • https://s3.amazonaws.com/bufipevuril/barry_lyndon_movie_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/saint_seiya_lost_canvas_2_temporada.pdfIn PDF document text
    • https://s3.amazonaws.com/luxelula/fuxesikoriwexinat.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_off00010262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10262 5308 bytes
SHA-256: 11422be31df3a5a1febb5d87287ced1a9cbda6900039464772cbfd492bd21e9b
font_01_sfnt_off00011485.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11485 10680 bytes
SHA-256: f090bf25e7bb806afcdf732e9ab6875d18d67ed4988c9eb28ad114192b415d31

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