Malicious PDF — malware analysis report

Static analysis result for SHA-256 5bfe1fb3d235842c…

MALICIOUS

PDF

80.1 KB Created: 2021-03-21 03:59:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: d13b32134145ac0b2734877b9bbda8a6 SHA-1: 9c123b9629900d7ab4be2fcd372c70a54384d955 SHA-256: 5bfe1fb3d235842c4a34535f4c96bc7ee2fb07f90ec8db613188466aa74c5f28
126 Risk Score

Malware Insights

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

The PDF document contains multiple external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further malware or phishing for credentials. The document body, though heavily obfuscated, contains references to software installation, reinforcing the lure aspect.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://druttle.ru/wix?keyword=how+to+get+flipaclip+on+pc PDF link annotation
    • https://tiwibuvemugijaj.weebly.com/uploads/1/3/0/7/130776889/2102379.pdfIn PDF document text
    • https://genexezo.weebly.com/uploads/1/3/4/6/134616565/mipaxireki.pdfIn PDF document text
    • https://tulofezufiruz.weebly.com/uploads/1/3/1/4/131409090/rujakajesinidiril.pdfIn PDF document text
    • http://goxivomibivufuv.mywebcommunity.org/4d_printing_technology.pdfIn PDF document text
    • https://ripodomix.weebly.com/uploads/1/3/0/7/130775876/d6a6e6f56d532bb.pdfIn PDF document text
    • https://kumobavubisu.weebly.com/uploads/1/3/0/7/130775432/3e131.pdfIn PDF document text
    • https://lomimasexoguxi.weebly.com/uploads/1/3/4/7/134736135/dawukefipu.pdfIn PDF document text
    • https://rujuzodojavumip.weebly.com/uploads/1/3/4/7/134726220/250cb1b6217.pdfIn PDF document text
    • https://rebeluzibefu.weebly.com/uploads/1/3/4/6/134619862/2008c9f4.pdfIn PDF document text
    • https://waragorejitise.weebly.com/uploads/1/3/0/8/130813548/794e9e77eff2e.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/lixuzo/call_soap_web_service_from_java_using_httpclient.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a38c7495-4027-4285-b5cf-3684bfc35c39/toliboxef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c2d0ffe-b25e-4d40-a830-867470a86b57/lista_de_verbos_en_ingles_regulares_pasado_simple.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf58ae4b-c23c-467f-be77-2f0f2f98644e/mabusebefikowijiluvizufa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8012ada-b9c4-4115-a99f-c0def166b01c/what_are_examples_of_evil.pdfIn PDF document text
    • https://s3.amazonaws.com/borokegujuzero/font_huruf_jawa_untuk_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50bbb4d7-c24a-48b5-b4c4-5d09dfe6f3fd/3631288776.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/xixil.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_off0000f9fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FE 4960 bytes
SHA-256: 302a095551a26f6de8953e5ff1e9b14d4299d743890078741f7a5e56ab9a7dc4
font_01_sfnt_off00010b18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B18 11512 bytes
SHA-256: 077cf141e790f256e3afd62000f283e45219a13a8666e4e4f4968c7feb60e0db

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