Malicious PDF — malware analysis report

Static analysis result for SHA-256 96fa8572bcf80640…

MALICIOUS

PDF

79.5 KB Created: 2021-03-17 23:56:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f69287755d546070859f1999715087cd SHA-1: 18b5d93e4f473ce017c5028e350fa6921d320d40 SHA-256: 96fa8572bcf80640d9b48a700a63ae366a65b1dc6f26b6358efc0f305bb21a4d
156 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 0.9997

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 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://druttle.ru/strik?utm_term=black+and+decker+leaf+blower+bv3100+replacement+bag PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387040/normal_602220ff55a8c.pdfIn PDF document text
    • http://kurixuj.sportsontheweb.net/.pdfIn PDF document text
    • https://dulawatekonirul.weebly.com/uploads/1/3/4/5/134589918/1207966.pdfIn PDF document text
    • https://mugafurevokez.weebly.com/uploads/1/3/4/8/134894013/2305171.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412570/normal_600270dd3637d.pdfIn PDF document text
    • https://tufulikuzusader.weebly.com/uploads/1/3/4/8/134866114/romimosobod_xowakemusiki_pazikoxitopusu.pdfIn PDF document text
    • https://suxaniwaxunese.weebly.com/uploads/1/3/4/3/134385499/zumigo_sedudanozaguke_sepabu.pdfIn PDF document text
    • https://xizikako.weebly.com/uploads/1/3/0/9/130969027/musokuli.pdfIn PDF document text
    • https://vosikobogoj.weebly.com/uploads/1/3/4/2/134235386/935707.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495558/normal_6027cd0334328.pdfIn PDF document text
    • https://lofefogurabu.weebly.com/uploads/1/3/1/1/131164054/sirolopazu.pdfIn PDF document text
    • https://gufurokis.weebly.com/uploads/1/3/1/4/131453316/8781175.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rukosivujuxu.atwebpages.com/piwozodemanibejovu.pdfIn PDF document text
    • https://s3.amazonaws.com/lawakux/simple_receipt_template.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/taxomogunakafijaxiz.pdfIn PDF document text
    • https://77047a80-9f17-4504-a563-a097c25ca12e.filesusr.com/ugd/5c8b2f_b63174ccc1ca4e7ab0b5a7ceba744d06.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/browser_file_hippo._com.pdfIn PDF document text
    • https://s3.amazonaws.com/resabomibogodaw/38911619835.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/beethoven_piano_sonata_14_analysis.pdfIn PDF document text
    • https://21a67f6d-2aea-439f-a910-ed4feb6be009.filesusr.com/ugd/173616_aec0127e183f4e6e8c66b2282a7d6e57.pdf?index=trueIn PDF document text
    • http://xemigososefof.atwebpages.com/musculos_antagonistas_y_agonistas.pdfIn PDF document text
    • http://vubuzixefixa.onlinewebshop.net/a_level_economics_revision_guide.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_off0000f12b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF12B 6060 bytes
SHA-256: fa4e41977d020e0343fa358e64accf3ccaa73774010ea58bc6e0fb3eb5eef6d6
font_01_sfnt_off000105da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105DA 12732 bytes
SHA-256: 7dd504a8146ee963acb1db6a3739b13717471da827f4ae3c2f725f5e820925ee

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