Malicious PDF — malware analysis report

Static analysis result for SHA-256 967b344f9047f426…

MALICIOUS

PDF

81.0 KB Created: 2021-03-19 06:37:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d6ec43c820af1040ef26def08fdef96f SHA-1: 5ecd083f3deb838d587cd0deababdd513136d0bb SHA-256: 967b344f9047f426dbbd860890728fec6086784c54051a0a54129a39b7bda31c
186 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 0.9998

Heuristics 6

  • 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.
  • 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://gimoguvi.ru/award?keyword=circulatory+system+of+fish+pdf PDF link annotation
    • https://pesawuzopedeg.weebly.com/uploads/1/3/5/3/135327269/ruvivamoburunekiri.pdfIn PDF document text
    • https://wojawodexof.weebly.com/uploads/1/3/4/6/134673733/6477722.pdfIn PDF document text
    • http://sefegusekepuxa.mypressonline.com/61147081496.pdfIn PDF document text
    • https://relitaju.weebly.com/uploads/1/3/4/8/134888942/02bf9cce319.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476767/normal_6038727285fff.pdfIn PDF document text
    • https://cdn.sqhk.co/lelitojo/ibUiahe/apple_tv_2nd_generation_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446287/normal_603015cd888f6.pdfIn PDF document text
    • https://xudowiwigikit.weebly.com/uploads/1/3/4/4/134462868/towasup-kafatogijo-tapulutewile-gedaseliraroju.pdfIn PDF document text
    • https://rowigimafusapop.weebly.com/uploads/1/3/5/9/135982222/1268742.pdfIn PDF document text
    • https://cdn.sqhk.co/duwenaxiseve/GlhWgf1/56850042189.pdfIn PDF document text
    • https://cdn.sqhk.co/nexupumile/Kjbl3Rm/77933033151.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/kelageketisefuv/66459014514.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf5eca09-fb03-4fdd-bc4e-797058d9c592/wibuxilosomenavaw.pdfIn PDF document text
    • http://xiniwipilanaju.atwebpages.com/gokijun.pdfIn PDF document text
    • https://s3.amazonaws.com/rowubunak/lagu_airplane_bts_mp4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/360f9b28-18d8-438d-bcea-bac16cb426fc/79946308299.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/difficult_customer_interview_question_and_answer.pdfIn PDF document text
    • http://belibivizonojo.myartsonline.com/pefogitu.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_off000101a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A7 5404 bytes
SHA-256: f844d446738d9188b6ebd2078c0c871ddd7c450738dc4148d237eedcee6c0998
font_01_sfnt_off000113e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E5 10296 bytes
SHA-256: 7a5d0d007ab305a1d1ac323a133b3c3edad2bf5f10bd6050ab7e8256e6f5fe5b

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