Malicious PDF — malware analysis report

Static analysis result for SHA-256 da5d01e06c4c2f01…

MALICIOUS

PDF

74.3 KB Created: 2020-12-23 12:20:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ff3c5c8df22bf2fa1443842eeea72b1e SHA-1: cf15778a0c33cab288d7daad9e59ff5984c494bc SHA-256: da5d01e06c4c2f01c10626e433ae8adc8e57116e9bbc64c6eacee70bcfdb218c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple external URIs and is flagged by ML classifiers and ClamAV as malicious phishing content. The document body, though heavily obfuscated, suggests a lure related to an 'iphone 11 pro max giveaway 2020'. The presence of numerous links to disposable hosting and the overall structure indicate a phishing campaign designed to redirect users to malicious sites.

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 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://traffset.ru/123?utm_term=iphone+11+pro+max+giveaway+2020 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413851/normal_5fa6f06092f68.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426424/normal_5fc4f8b44d5eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387232/normal_5fdd8aa128af3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416675/normal_5fb58b8f31856.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368494/normal_5f99b5741d401.pdfIn PDF document text
    • https://bisojobiregabo.weebly.com/uploads/1/3/4/5/134509607/cd6dfab19a3d.pdfIn PDF document text
    • https://jelisewisu.weebly.com/uploads/1/3/1/4/131410299/jaberivaz_ketevof_janepepanano_pafitetegeva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458388/normal_5fa46d6f9db78.pdfIn PDF document text
    • https://gafekiwukuwemul.weebly.com/uploads/1/3/4/3/134313713/dc8a0c2.pdfIn PDF document text
    • https://lesofetu.weebly.com/uploads/1/3/1/3/131378838/5f71e0a64b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393626/normal_5fc02a0da34c9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/d61b8c52-cb67-4da6-a0b3-815cee1bc945/28272009091.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/akuntansi_sebagai_sistem_informasi_ekonomi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCCD 5316 bytes
SHA-256: a085a8623b4a54c157c2ca6ca44a32929093264aa98779ed9edd71b74ba43845
font_01_sfnt_off0000deb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB5 2092 bytes
SHA-256: 13678a14b930e6d42e11b2ac41b13981c2c7f5938cc30cfb194ad51886f1f1dd
font_02_sfnt_off0000e85a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE85A 11304 bytes
SHA-256: 340f34391b34af336d2adc37a6b59ef926d478ba63e2912e420709a5a7555418
font_03_sfnt_off00010e08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E08 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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