Malicious PDF — malware analysis report

Static analysis result for SHA-256 f946a60e32b3eddc…

MALICIOUS

PDF

78.3 KB Created: 2021-03-22 21:54:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: f624bc4481db202c8a9eef471f0d09f9 SHA-1: bfe395e92cf31ce42e2ff518d446978925bdb32c SHA-256: f946a60e32b3eddc6dcd768b9becf19964e9f08e30cd2396bb34198e38881df9
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to drive traffic to potentially malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and extensive link farm are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ponafet.ru/award?keyword=administracion+de+empresas+gastronomicas+pdf PDF link annotation
    • https://gapuromediwav.weebly.com/uploads/1/3/0/8/130814643/topogudolugume_xupozurug_bagasuleb_subon.pdfIn PDF document text
    • http://ch-bewertung-2888.xyz/xoboxofikafizafnfn8u.pdfIn PDF document text
    • https://nodopemewave.weebly.com/uploads/1/3/2/6/132682748/99d2fc7878.pdfIn PDF document text
    • http://bathforlegs.xyz/the_neverending_story_3_songsq3sv3.pdfIn PDF document text
    • https://vezutokabev.weebly.com/uploads/1/3/4/7/134758566/robefadadejuzo_bibujufuxezojor_sadobowosup_lawaja.pdfIn PDF document text
    • https://tawuvumiru.weebly.com/uploads/1/3/5/3/135326103/pibusas-tanumegapasepe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450724/normal_60395787a1e1f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410695/normal_60054c3f3de2d.pdfIn PDF document text
    • http://beliyden.xyz/samsung_q6f_special_edition_reviewp6qoy.pdfIn PDF document text
    • https://lixojubenolida.weebly.com/uploads/1/3/4/3/134375882/2663402.pdfIn PDF document text
    • https://webolubodu.weebly.com/uploads/1/3/0/9/130969971/499ac52e3113a68.pdfIn PDF document text
    • https://bunofavaluz.weebly.com/uploads/1/3/4/6/134661637/mixewupexem-bazobuloxaw-ludel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416665/normal_6011642567075.pdfIn PDF document text
    • https://lijepaxo.weebly.com/uploads/1/3/5/3/135324298/0afc536.pdfIn PDF document text
    • https://gojenegitoz.weebly.com/uploads/1/3/4/3/134387591/sajesibemapiworakam.pdfIn PDF document text
    • https://davufafelasipip.weebly.com/uploads/1/3/4/3/134328138/nigetaj-xunurivobakip.pdfIn PDF document text
    • https://situzofunuk.weebly.com/uploads/1/3/5/3/135305293/jedawas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391893/normal_5fd08417aa077.pdfIn PDF document text
    • https://mitosimizede.weebly.com/uploads/1/3/4/3/134372473/voxikimezovuwula.pdfIn PDF document text
    • https://libufuvebugun.weebly.com/uploads/1/3/1/4/131406816/88002954.pdfIn PDF document text
    • http://pubgmobiie.com/the_communist_manifesto_in_tamil3c85b.pdfIn PDF document text
    • https://zanewodibamejat.weebly.com/uploads/1/3/0/9/130969445/jalarizovomunek.pdfIn PDF document text
    • https://pizopivawot.weebly.com/uploads/1/3/5/3/135347149/bivixarurixek_vobopizoluje.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000f48f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48F 5432 bytes
SHA-256: 23f8b8e9e9c0ff1cdf25e01b09d26b76a0b8a0e091d632841694d28319953b4c
font_01_sfnt_off000106f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F3 10732 bytes
SHA-256: 9cfdf1b849825d2b5c00be20597d482b1bf4897d1aaf88a77c304d333305dae2