Malicious PDF — malware analysis report

Static analysis result for SHA-256 0768f14cfa5ad29d…

MALICIOUS

PDF

75.2 KB Created: 2021-02-18 08:40:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 2cbc9c67f3428fd4ca025aa82cc5ce1e SHA-1: dbe65e68af9dbf830bd490f849567534c4151ec1 SHA-256: 0768f14cfa5ad29d1b10827eee3288092afc5e2aa268c3a4b2e58ff9e6d67617
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by 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 5

  • 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://maypoin.ru/strik?utm_term=what+is+the+shortcut+key+for+screenshot+in+windows+10 PDF link annotation
    • https://raxorevowipafe.weebly.com/uploads/1/3/4/7/134765671/9403190.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413982/normal_601307ec585ec.pdfIn PDF document text
    • https://pudorexejuvaw.weebly.com/uploads/1/3/1/4/131455832/056cdb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469375/normal_5fe713a06e397.pdfIn PDF document text
    • https://nagiwavimev.weebly.com/uploads/1/3/4/6/134612684/8452487.pdfIn PDF document text
    • http://douchehub.xyz/xigufasupojikareseruxc4blt.pdfIn PDF document text
    • https://tafanoxuxirugo.weebly.com/uploads/1/3/5/3/135327873/2307700.pdfIn PDF document text
    • http://magozeveta.iblogger.org/soundcloud_api_for_android.pdfIn PDF document text
    • https://disaximineta.weebly.com/uploads/1/3/4/8/134883765/74e060767142931.pdfIn PDF document text
    • http://vash-fasad.live/40094233536j7enj.pdfIn PDF document text
    • http://kpupnov.pro/77784209362i816f.pdfIn PDF document text
    • https://siwusoxol.weebly.com/uploads/1/3/4/5/134584737/1611107.pdfIn PDF document text
    • http://skywonder.space/the_critical_period_political_cartoon_meaningn4uo2.pdfIn PDF document text
    • http://bobejitamatu.iblogger.org/ligujewemepudixopazigot.pdfIn PDF document text
    • https://betebawaxudu.weebly.com/uploads/1/3/5/3/135388356/zabavumafagi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384851/normal_6022ca7faf8c2.pdfIn PDF document text
    • https://bowutemol.weebly.com/uploads/1/3/4/2/134234741/xalixelawar-zimomavefufa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://labomodofu.epizy.com/dasakisumefabimuw.pdfIn PDF document text
    • http://radulamuwufudez.epizy.com/kosutebuzurenapuleb.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_off0000e5cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5CD 5544 bytes
SHA-256: dcb096bf9bc8718f30fe9cfa398bbe58163862f334ef8f704245cd2406894f11
font_01_sfnt_off0000f8c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8C9 11172 bytes
SHA-256: 1279cc5aaf01dce86259364209c9084616411b9fb62d65a77b800b3c53ebfc3f

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