Malicious PDF — malware analysis report

Static analysis result for SHA-256 304920dd616697aa…

MALICIOUS

PDF

78.3 KB Created: 2021-03-16 10:26:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: d1950a637c1c111e9f7bf2a030c5d756 SHA-1: 1376faf524440d898c580d0a37cfd413f343d04e SHA-256: 304920dd616697aa203c1d82c614b93bfad29458bc195a9fe3b36b15a967a9a8
154 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. It uses an "enable content/editing" lure. The file embeds a large number of external links characteristic of an SEO link farm and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://golowaki.ru/123?utm_term=performance+appraisal+spreadsheet+template PDF link annotation
    • http://elinekici.online/how_to_install_first_alert_smoke_and_carbon_monoxide_detector65mu7.pdfIn PDF document text
    • http://rubka.space/krk_audio_tools_apk_downloadfpsr0.pdfIn PDF document text
    • http://golden-bridge.pro/8249274599198j7p.pdfIn PDF document text
    • http://pazujiz.mygamesonline.org/the_elegance_of_the_hedgehog_movie_where_to_watch.pdfIn PDF document text
    • http://italiahot.space/bemipowawuboa7k49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390995/normal_600b547906fc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422382/normal_600b73187e7bd.pdfIn PDF document text
    • http://xagugudel.sportsontheweb.net/cambridge_dictionary_of_idioms_and_phrases.pdfIn PDF document text
    • http://kixiwogazu.sportsontheweb.net/bixololusesajafinuresifo.pdfIn PDF document text
    • https://supuzuvafexag.weebly.com/uploads/1/3/5/3/135383103/gukitutikum.pdfIn PDF document text
    • https://wudigunufite.weebly.com/uploads/1/3/4/6/134611509/16c2c987e016848.pdfIn PDF document text
    • https://tiwibuvemugijaj.weebly.com/uploads/1/3/0/7/130776889/zuzuvejuletulo-dumefuba-gizufitezivogo.pdfIn PDF document text
    • http://xuruwerufasafer.22web.org/90773800926.pdfIn PDF document text
    • http://serovakarara.mygamesonline.org/caste_list_in_karnataka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425759/normal_600b65505de7a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mofuvuziwoloj.epizy.com/rain_gun_irrigation_system_design.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/14876459161.pdfIn PDF document text
    • http://badubitoj.epizy.com/flowchart_maker_online_tool.pdfIn PDF document text
    • https://s3.amazonaws.com/babuxufarizuxur/bigeminismo_ventricular_causas.pdfIn PDF document text
    • https://s3.amazonaws.com/vosimalume/amazon_business_plan_1994.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_off0000f570.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF570 5396 bytes
SHA-256: de6d3056e60736c1e66b15ee8ce3cc7c0a680fd9c8e77bf592c4b4f221496c98
font_01_sfnt_off00010796.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10796 10776 bytes
SHA-256: 7d8b77640f5a8323c4afbd9826b162a976f9fe1b0ca7b24920b43e3e1f8dbfc0

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