Malicious PDF — malware analysis report

Static analysis result for SHA-256 04350602f4b1ba51…

MALICIOUS

PDF

74.8 KB Created: 2021-02-17 22:55:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 9e54c8a26eeae6755e2a3e6789c0fdae SHA-1: 96a986ee191fd5ad6302eef0c05f6fb0cda36449 SHA-256: 04350602f4b1ba51c93d0ce2a8ee69329a24779f8b822b4591cdda2053500f61
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many of which are obfuscated or use numeric slugs, indicative of a link farm or SEO spamming technique. The primary URL suggests a lure for downloading a manual, which is a common phishing or malware distribution tactic. ClamAV and ML classifiers also flagged this PDF as malicious, specifically as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/strik?utm_term=breitling+aerospace+manual+download PDF link annotation
    • http://vekvelo.ru/70995892142zk3jw.pdfIn PDF document text
    • http://meetsoda.pro/kajivemokolegumibokogug9wxj0.pdfIn PDF document text
    • https://xuzijobozu.weebly.com/uploads/1/3/1/4/131411245/nojad.pdfIn PDF document text
    • https://lejujazu.weebly.com/uploads/1/3/5/3/135337057/26763.pdfIn PDF document text
    • https://tezefidusipenu.weebly.com/uploads/1/3/1/8/131857758/sijebipupulige.pdfIn PDF document text
    • https://gepekipaw.weebly.com/uploads/1/3/5/3/135304147/zugufajuxuriwolav.pdfIn PDF document text
    • http://procripton.com/hildings_krog_white_guidewmlqx.pdfIn PDF document text
    • http://gitutemove.iblogger.org/83247543230.pdfIn PDF document text
    • https://surigogalabilix.weebly.com/uploads/1/3/5/9/135961506/dupufewokaker_wedure_redazedazoxoze_tuguzoz.pdfIn PDF document text
    • http://furniture21.online/46475220667apee7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nozumipoz.epizy.com/winemej.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/sagifumabanafojitotaxu.pdfIn PDF document text
    • https://s3.amazonaws.com/verirejon/3463601251.pdfIn PDF document text
    • https://s3.amazonaws.com/rexogeguxosix/nigutigulumukavuxibid.pdfIn PDF document text
    • http://pujifobekef.epizy.com/33667819255.pdfIn PDF document text
    • https://s3.amazonaws.com/debamijizozexo/blessings_laura_story_free.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/29332142640.pdfIn PDF document text
    • https://s3.amazonaws.com/xamapebonijos/asking_questions_worksheets_1st_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/taduzujoxikaf.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/861137614.pdfIn PDF document text
    • http://riremeg.rf.gd/walmart_financial_statements_2018.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_off0000e530.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE530 5536 bytes
SHA-256: 699c31cba22de8f8b7dc1f8b3f4c53e1eba0b3e5462c30d84b47c9e8231164a1
font_01_sfnt_off0000f7f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F9 11644 bytes
SHA-256: cf4898026a1f41745b12bc9793f4914c96c5f3338f92dae835bcbbdad725713f

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