Malicious PDF — malware analysis report

Static analysis result for SHA-256 47af9d6b5c673d82…

MALICIOUS

PDF

106.4 KB Created: 2021-03-14 22:09:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: cc9d4fcf855fedca7973c7637eeefa71 SHA-1: 25e642748c6e30a91bfc5ee681cfb9f632f4e044 SHA-256: 47af9d6b5c673d82a9c0bc640a4c4edc1d11c27919f5240d1632728625528f5b
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified as a phishing attempt by ClamAV and a machine learning classifier. The document body, though heavily obfuscated, suggests a lure related to 'calf strain rehab exercises pdf'. The presence of numerous external links, many on disposable hosting, further supports a link farm or phishing scheme.

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 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.
  • 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://pelibifir.ru/award?keyword=calf+strain+rehab+exercises+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4475874/normal_5fde2ea6ce745.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390081/normal_604bbd404e11c.pdfIn PDF document text
    • https://medefidonirefej.weebly.com/uploads/1/3/5/3/135324812/9464895.pdfIn PDF document text
    • https://mamowolo.weebly.com/uploads/1/3/4/7/134714390/vikejejulav_musisir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366982/normal_6001e6a99ded9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485799/normal_604ca9d8854c2.pdfIn PDF document text
    • https://wajefoxefibivi.weebly.com/uploads/1/3/2/8/132814680/rapuvenevuf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370533/normal_5fcad6c496a5d.pdfIn PDF document text
    • https://turakenedonatup.weebly.com/uploads/1/3/4/6/134610331/24ec63ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448323/normal_5fe5d9e0d3fad.pdfIn PDF document text
    • https://garisufusomepis.weebly.com/uploads/1/3/0/7/130740000/1471203.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413242/normal_602018528b22f.pdfIn PDF document text
    • https://xaweworamek.weebly.com/uploads/1/3/4/6/134610398/0804b5e76a3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/69bcfb41-a594-4cfa-8e89-9cf289f98468/13063566408.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/58461646177.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bda6afc6-7f94-4290-9312-cf4d317fb643/fesowefa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be4124dd-216d-4853-95f4-d9a4a3e9a078/will_festivals_happen_in_2021_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/xemanisuworago.pdfIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/going_nowhere_fast_ielts_answer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d847814-758d-4871-9f19-9c4eff636880/5216110786.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_off000162ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x162AC 5356 bytes
SHA-256: 966961e42d47b4226465e8d156f8160fbf74c5cbb42ee83abc86dc8e4cb63514
font_01_sfnt_off000174d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x174D8 11604 bytes
SHA-256: 8485d5716210bccdb352e1831c451d64aa129f8ab96a559b4f2384fb09885b66

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