Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bb8a2b7051a255d…

MALICIOUS

PDF

74.5 KB Created: 2021-04-07 02:05:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: b63ac08f47c97e7ac70130d7929016a1 SHA-1: 8f0cbaa1c079d41bd9ebfd5931ffe9a79c3c4025 SHA-256: 3bb8a2b7051a255dd615c33e8c6517516e3d6c02d240209314361c3f89e8ed5f
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 0.9997

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://seumenha.ru/strik?utm_term=why+won%2527t+my+nespresso+machine+froth+milk PDF link annotation
    • http://nashremont.site/bilegukalefobeve8q0.pdfIn PDF document text
    • http://faripofijukevom.mywebcommunity.org/kasokuxegorejobi.pdfIn PDF document text
    • http://bestsaleshopin.xyz/10_snf_fizik_ders_notlar_indirb9ior.pdfIn PDF document text
    • http://fuvisetitisenon.mypressonline.com/flow_shear_stress_equation.pdfIn PDF document text
    • https://zeruxitewisav.weebly.com/uploads/1/3/1/8/131856065/4110675.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/jghjxXO/71062831694.pdfIn PDF document text
    • http://microbestdigitalmeter.xyz/rocket_league_cross_platform_voice_chato6uc2.pdfIn PDF document text
    • http://unityfree.xyz/64340019373yd9cm.pdfIn PDF document text
    • http://inglassrus.ru/how_to_build_a_good_house_in_minecraft_survival_easydn0kd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494868/normal_5ff129fc9fa05.pdfIn PDF document text
    • http://mamafiposorugul.sportsontheweb.net/wetherspoons_menu.pdfIn PDF document text
    • https://jovinafunen.weebly.com/uploads/1/3/2/6/132695325/9782484.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376874/normal_60090a6b43538.pdfIn PDF document text
    • https://luxituwane.weebly.com/uploads/1/3/1/8/131859527/petodorubiriluzijos.pdfIn PDF document text
    • https://cdn.sqhk.co/jipogidara/mU7VhgE/92984808092.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491934/normal_6017260bb20cf.pdfIn PDF document text
    • https://dironirodog.weebly.com/uploads/1/3/4/7/134760169/c9a9f54f37f8.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/631cad31-7668-4d90-a13b-4086de387e0a/free_kindergarten_math_worksheets_counting_to_20.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28fb8197-fdcc-4495-86cd-21be3fffc566/we_were_liars_summary_ending.pdfIn PDF document text
    • http://bivojeda.atwebpages.com/jovos.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_off0000e43a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE43A 5560 bytes
SHA-256: 6819dfa91c17a148529da9ab583aae8c9b7621cf215bc3f41342c157170d2a81
font_01_sfnt_off0000f71f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71F 10884 bytes
SHA-256: 06cbbd385ab86964eba2c58b5a39b73355fb8c4b77147d051d8e342411a7489a

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