Malicious PDF — malware analysis report

Static analysis result for SHA-256 96b8739c76430983…

MALICIOUS

PDF

74.6 KB Created: 2021-02-28 19:22:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 15624c85f61fe5a5d59d04db35a57a32 SHA-1: 1582f2677743e091d96986a46e3fe34728879251 SHA-256: 96b8739c7643098316d0e3afc669f16dbf5fdabcf09a3ae0360e33d7d17b67c1
134 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/123?utm_term=data+structures+and+algorithms+in+c%252B%252B+drozdek+pdf PDF link annotation
    • http://lelofewadu.iblogger.org/budemixokokononubava.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499999/normal_6032111403f6f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476015/normal_600388c9a3a6b.pdfIn PDF document text
    • http://juwupexutaval.mywebcommunity.org/cloud_9_vape_raleigh.pdfIn PDF document text
    • http://lefunus.iblogger.org/gojavekuwajufap.pdfIn PDF document text
    • http://vemasujananexu.22web.org/21945038048.pdfIn PDF document text
    • http://wipunemobak.mygamesonline.org/83137474101.pdfIn PDF document text
    • https://webegerux.weebly.com/uploads/1/3/4/7/134759049/69877c815c2006.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471959/normal_60374d9120c4f.pdfIn PDF document text
    • https://lerorenoj.weebly.com/uploads/1/3/5/3/135390996/6769677.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448346/normal_5fe310c5aef05.pdfIn PDF document text
    • http://worabipupe.mypressonline.com/what_does_a_river_runs_through_it_mean.pdfIn PDF document text
    • http://sigisuzuk.getenjoyment.net/hard_sat_reading_passages.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414173/normal_600b388f8a135.pdfIn PDF document text
    • http://govazibibili.22web.org/34745715322.pdfIn PDF document text
    • https://kopaluzakiletal.weebly.com/uploads/1/3/0/7/130739322/ripugaditujad_sapog_bogozula.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456705/normal_5fe9d6724084e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497075/normal_601060a3334bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489730/normal_5fd3a2953d51f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://muvuferoditewum.epizy.com/748960163.pdfIn PDF document text
    • http://jisukizopupez.rf.gd/67010166928.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_off0000e1c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C5 5680 bytes
SHA-256: 1bfef2e816e4de5010b0e06b4537ad4ecb9e817d3f63628412214381e3a434ad
font_01_sfnt_off0000f4f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F8 11608 bytes
SHA-256: 0aad81e32170ba8ee95f929e936db78f00c9b614c1b8be71f1bf1d847a5f2836

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