Malicious PDF — malware analysis report

Static analysis result for SHA-256 29fb152bbd1869ea…

MALICIOUS

PDF

79.6 KB Created: 2021-03-28 22:09:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3f9eabad4e1233b853c1a8cae02d551d SHA-1: 10a2aeaf45c9ddb46ac9eb458043d3d726acca7d SHA-256: 29fb152bbd1869ea78136ebdbafbb2d7dcabb85299129d6f6070e5c4e54f36d8
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://jacksth.ru/award?keyword=causes+of+deforestation+in+africa+pdf PDF link annotation
    • http://tobufupevujuma.mygamesonline.org/is_income_ratio_or_interval.pdfIn PDF document text
    • http://dream-stat.ru/the_crown_season_1_episode_2_full_episodeu1wt0.pdfIn PDF document text
    • http://pebifakonek.sportsontheweb.net/58897912382.pdfIn PDF document text
    • http://dimax-matrasy.ru/bulomawamewuwakoxiwadut6odj.pdfIn PDF document text
    • http://talkme-news.info/12191051232383r5.pdfIn PDF document text
    • http://lowufadit.scienceontheweb.net/ammonia_vapour_compression_refrigeration_system.pdfIn PDF document text
    • http://nosetibadap.iblogger.org/diminishing_value_depreciation_excel_template.pdfIn PDF document text
    • http://rollernefritmassage.xyz/jalenuzp6vvn.pdfIn PDF document text
    • http://tradebot.space/access_consciousness_foundationt9fhw.pdfIn PDF document text
    • http://testersairf.xyz/fundamentals_of_automobile_body_struk2u9r.pdfIn PDF document text
    • http://mp4.design/351281595248f3dn.pdfIn PDF document text
    • http://komaxinatobofe.medianewsonline.com/how_to_connect_turtle_beach_wireless_headphones_to_iphone.pdfIn PDF document text
    • http://lorenbayi.com/18314537989yhs2n.pdfIn PDF document text
    • http://dkmz1.club/miller_bobcat_225_welder_generator_manualhxsxo.pdfIn PDF document text
    • http://help-bluebadgecenter.com/definition_of_full_time_employee_for_benefitsbx371.pdfIn PDF document text
    • http://lesibixubivazo.22web.org/2264202515.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vojilub.rf.gd/98055407752.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edfb6a76-daa7-4321-9d0d-f6ad6a8b49e4/segofigekoxisunodomute.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebb6eb76-8fbb-454c-96c8-fb1afbb15f9f/newetejezumu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85fb61a2-d469-4ffc-ac72-b177c24551e3/komisosewigotirupawida.pdfIn PDF document text
    • http://kunijudodo.rf.gd/beaconsfield_primary_school_uniform.pdfIn PDF document text
    • http://zutulig.epizy.com/78281843572.pdfIn PDF document text
    • http://vegawududabuz.rf.gd/how_do_you_cook_a_costco_spiral_ham.pdfIn PDF document text
    • http://xidozine.rf.gd/94747595381.pdfIn PDF document text
    • http://monuwuwotivonil.epizy.com/52897204156.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_off0000fa46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA46 5024 bytes
SHA-256: 874615ac45b664ca3df1b99086eef33948d234e51c0a943fbb91c7cd373c6af2
font_01_sfnt_off00010b69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B69 10956 bytes
SHA-256: 73e806b799e2d36876a96f710ddaa796e5f5e5dac8211ee4c4121ddd5c425f73

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