Malicious PDF — malware analysis report

Static analysis result for SHA-256 89f05393f412fd01…

MALICIOUS

PDF

118.5 KB Created: 2021-03-04 00:46:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 9769ccf0108ff64d1a2f348116311c6d SHA-1: 1e86c988836ab6e96c3e47a8bbc57d2a1abc39fe SHA-256: 89f05393f412fd01110d292ba6ee2b0c181b757e2ccd3eb55f6d56831e22938b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing and link farm attack. The document contains numerous external links, disguised under a seemingly innocuous "Star wars trilogy book review" theme, intended to direct users to various websites. The primary purpose appears to be SEO spam and potentially phishing, leveraging a large number of generated links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/strik?utm_term=star+wars+trilogy+book+review PDF link annotation
    • http://kifopelidito.mypressonline.com/guzuvadezowuwolujofivigug.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444626/normal_5fcb5fe6dcbe1.pdfIn PDF document text
    • https://digavonuvuveg.weebly.com/uploads/1/3/4/8/134851043/mokowiwekaraxed-bijinazugemisit-fataruvuvik.pdfIn PDF document text
    • https://pulatufulufu.weebly.com/uploads/1/3/4/6/134610330/ae19a2100c59153.pdfIn PDF document text
    • https://cdn.sqhk.co/lekusovu/bz887AQ/kapoosh_knife_block_amazon.pdfIn PDF document text
    • https://lipodemofuxe.weebly.com/uploads/1/3/5/3/135316225/mijebora_renuzomavigew_fufijajuke.pdfIn PDF document text
    • https://vosuxawa.weebly.com/uploads/1/3/1/1/131164537/bbdb748cd4ec61.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495244/normal_600489f0ca993.pdfIn PDF document text
    • http://pedagodogiko.getenjoyment.net/vujiwulatore.pdfIn PDF document text
    • https://jewelilug.weebly.com/uploads/1/3/4/3/134331877/kulezur-xetariter.pdfIn PDF document text
    • http://bisibometixo.mywebcommunity.org/kesorujometamugamiwatewad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382201/normal_5fd096c731ac3.pdfIn PDF document text
    • https://zesadokalefon.weebly.com/uploads/1/3/2/6/132681767/lodaxagopej.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402707/normal_5ff7bbd5cb008.pdfIn PDF document text
    • https://boxotegiperofog.weebly.com/uploads/1/3/1/3/131398000/d0072a24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390663/normal_5fe77a0e9ae0b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://duxegejuw.atwebpages.com/seiko_solar_chronograph_v172_review.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_off00018600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18600 5416 bytes
SHA-256: 71d30814c470aef22c7e6702e9ef173cbfdd37bb8641209198e0cb5bc39a53a6
font_01_sfnt_off00019895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19895 16720 bytes
SHA-256: 4e7e3e1c347212c8042d770d547faf9efc232c99c94bc11cef45b9f1513c9c4f

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