Malicious PDF — malware analysis report

Static analysis result for SHA-256 01790f07b7e98049…

MALICIOUS

PDF

80.4 KB Created: 2021-02-25 14:40:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: d65746bb95436430ac4886dffe4d0c7c SHA-1: 0e8ad486140e370a911d0f844c3df89cc6e212db SHA-256: 01790f07b7e98049adaf13ebccc06f39b56407e0b9827a15adb98da196c0af73
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a large number of external links, many of which point to other PDF files, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malicious redirection attempt, likely leveraging embedded JavaScript for execution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/strik?utm_term=lateral+thinking+examples+solutions PDF link annotation
    • https://zewemoledomuro.weebly.com/uploads/1/3/4/7/134746436/1432316.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421214/normal_5fe2e573a9303.pdfIn PDF document text
    • http://bamefidev.mygamesonline.org/841254268.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393483/normal_601a398fc80ee.pdfIn PDF document text
    • https://tunegize.weebly.com/uploads/1/3/4/5/134500295/f79c245ec.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484358/normal_5fdf13cd2d5cf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451574/normal_6003db9a30d92.pdfIn PDF document text
    • https://juladuwupib.weebly.com/uploads/1/3/4/7/134763366/930f583a9f504e.pdfIn PDF document text
    • http://wejuzofibab.medianewsonline.com/pdf_harry_potter_printable_activities.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446761/normal_5fdabb7b98b2f.pdfIn PDF document text
    • https://getiwojaxewife.weebly.com/uploads/1/3/4/0/134012456/a12ce3ef3d9111c.pdfIn PDF document text
    • http://pinezov.iblogger.org/beta_thalassemia_treatment_guidelines.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/dobikasukavu/30874153488.pdfIn PDF document text
    • https://s3.amazonaws.com/rafiralexezol/bus_stop_movie_telugu_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/papuja/fitbit_charge_2_size_guide_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/lepatugegizisu.pdfIn PDF document text
    • https://s3.amazonaws.com/kovibu/jaxebakibepogetotitino.pdfIn PDF document text
    • http://wowifimeziv.rf.gd/hiv_testing_guidelines_cdc.pdfIn PDF document text
    • https://s3.amazonaws.com/gezejoputiwinu/chicago_cubs_tv_schedule_2019.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_off0000fecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECF 5308 bytes
SHA-256: 759894b0f309f21084c018be5d9f603e40cde427e4cd9df5acb5f28ac628a23f
font_01_sfnt_off000110b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110B8 10496 bytes
SHA-256: fbc756d081a3337784af0a487a7028e94cdfd783df7372de2f0cf84eb2548660

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