Malicious PDF — malware analysis report

Static analysis result for SHA-256 eea7371e7058838c…

MALICIOUS

PDF

77.4 KB Created: 2021-03-26 09:23:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: ecc835ca2d498b9916fe21b8ca6cd0ee SHA-1: 5513fab1fdb8e5ad7f545cb4a4fa44714b95dea6 SHA-256: eea7371e7058838c68b72370e190cf557270ec6b9ed590adc69e4ae953178c92
66 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting or link farms, suggesting a tactic to drive traffic or potentially distribute further malware. The ML classifier strongly indicated maliciousness, and the PDF structure with many external links aligns with SEO manipulation or phishing lures. No scripts were extracted, but the presence of external links is a primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://jottigo.ru/wix?keyword=nier+ending+y+guide PDF link annotation
    • https://cdn.sqhk.co/xujurovemu/HjcuIig/nightmares_from_the_deep_3_davy_jones_walkthrough.pdfIn PDF document text
    • https://nezozavigarej.weebly.com/uploads/1/3/4/7/134727028/raxoxonu-nejefikimupunom.pdfIn PDF document text
    • https://cdn.sqhk.co/weruvewo/Djahfgi/kitedara.pdfIn PDF document text
    • https://zutomivopisi.weebly.com/uploads/1/3/6/0/136051870/9435127.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454808/normal_5fe113db330d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453332/normal_60592e49e1fc8.pdfIn PDF document text
    • https://xodebizig.weebly.com/uploads/1/3/2/6/132681497/5559665.pdfIn PDF document text
    • https://cdn.sqhk.co/rapowipijes/elbhije/42419143554.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418178/normal_605d689743221.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369160/normal_6045feea5ba7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403819/normal_5fd221ebebfae.pdfIn PDF document text
    • http://fisukebisogovi.22web.org/7122141902.pdfIn PDF document text
    • https://cdn.sqhk.co/mogowepuw/jhGjaia/16383391967.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457861/normal_601bc58d3a3e4.pdfIn PDF document text
    • https://powelogub.weebly.com/uploads/1/3/1/8/131871449/vexenamorobavifi.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
    • http://kexobub.rf.gd/63875643863.pdfIn PDF document text
    • http://zufabilo.rf.gd/77888435532.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/79244672918.pdfIn PDF document text
    • http://wumavububutiz.rf.gd/kabojuralibuzapoxubabi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6EB 4336 bytes
SHA-256: 155bfef84877487574f19e940806e45bbd55d2eb0845966d0343bf5eeaff61f6
font_01_sfnt_off0000f59f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59F 10876 bytes
SHA-256: db9c90ba0d36624847385e8fa7c11cfa0dca738aba3d61b26dfbde776784d569
font_02_sfnt_off00011a7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A7A 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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