Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aa9e1334916cc31…

MALICIOUS

PDF

76.5 KB Created: 2021-05-16 15:44:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1dcf9fdc32db841c4bab6f4b4dcc5c3e SHA-1: 2fc4a88812f76ceba1eef9c1974f4cd91c338d3e SHA-256: 2aa9e1334916cc314e8ba8fa9fc107d86a4378b91fbd91a85a700e07de7d22a4
186 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. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://lozipotod.ru/strik?utm_term=prim+die+in+mockingjay+part+2 PDF link annotation
    • https://titamifafipife.weebly.com/uploads/1/3/4/3/134315234/2627978.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446152/normal_601fcf2e51b58.pdfIn PDF document text
    • http://sozapemogoz.mygamesonline.org/wozig.pdfIn PDF document text
    • https://rofaxebawo.weebly.com/uploads/1/3/4/7/134750080/2599910.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462974/normal_600e3d883e135.pdfIn PDF document text
    • https://wimekigulaz.weebly.com/uploads/1/3/1/1/131163744/7020888.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450421/normal_600cc631da2ba.pdfIn PDF document text
    • https://napolapivu.weebly.com/uploads/1/3/5/3/135303388/3f6558054ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4504791/normal_6007e227309af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489596/normal_60305672ada8b.pdfIn PDF document text
    • https://mavitebe.weebly.com/uploads/1/3/1/1/131163983/6791f80b977.pdfIn PDF document text
    • https://zalewuko.weebly.com/uploads/1/3/4/6/134604420/basugidi-wivoduguwomoxax.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8fc1c2d6-49ba-4d63-8b95-0327ef2b1627.filesusr.com/ugd/1849a1_dd669e89b3294424b57db4a99581af95.pdf?index=trueIn PDF document text
    • http://xekapakifujekem.onlinewebshop.net/sijavazuzagumugofawa.pdfIn PDF document text
    • http://wewamamewiler.atwebpages.com/40677615933.pdfIn PDF document text
    • https://36622f5a-5a1b-41a5-aa98-965156e47ac2.filesusr.com/ugd/804ff6_4eca6237c1ef4b179adc1e02e613af0f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/26867510115.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/standard_bid_bond_form.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/kuriraxeluza.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_off0000ee7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7A 5556 bytes
SHA-256: bc57f50b4d9c2fbbb25bdc40191000e5911c46dde7ef6c872cf6f0ad4564156f
font_01_sfnt_off0001015d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1015D 10412 bytes
SHA-256: 20b68ef066f62c4f8980cefcf1e3a67536a482ffd1a521fdc5d0d0039f36268f

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