Malicious PDF — malware analysis report

Static analysis result for SHA-256 88ecea48562c1dba…

MALICIOUS

PDF

76.5 KB Created: 2021-03-28 22:19:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1dc56cce62f5c8d7ee37663680d26ade SHA-1: 5fec9e0fb99be886954249257d331431b10990e4 SHA-256: 88ecea48562c1dbafc7a9136630782abae1a86e5297d7eaee1d726d96fa667fa
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 0.9997

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://gimoguvi.ru/wix?keyword=netflix+free+apk+android PDF link annotation
    • https://xowajujamomuki.weebly.com/uploads/1/3/4/3/134321847/pegemawaraporu_depuzoloberuge_jedenazogika.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418783/normal_6018a9139db32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495262/normal_60173913d25a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490934/normal_603872544ee9f.pdfIn PDF document text
    • https://nogurutofuxuj.weebly.com/uploads/1/3/4/5/134525281/6781148.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454558/normal_6027562ee4cfc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448337/normal_60044c678a540.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464053/normal_6045be2b63308.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481062/normal_601336cb092b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372983/normal_5ff5551217f53.pdfIn PDF document text
    • https://dunevija.weebly.com/uploads/1/3/4/3/134306837/84029913f.pdfIn PDF document text
    • http://swiss-gear.store/215807241971tjt7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387933/normal_604fdc8a8bc77.pdfIn PDF document text
    • http://uspex22.online/3541783174weqfh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415768/normal_600692c48ecf5.pdfIn PDF document text
    • https://xuxedujuwa.weebly.com/uploads/1/3/5/3/135345360/8262645.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491450/normal_601851eda1295.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383795/normal_5ff4993393f06.pdfIn PDF document text
    • https://jekowidemovo.weebly.com/uploads/1/3/4/7/134702183/takapejofik.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484609/normal_6020fd9f3dd79.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_off0000eeb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB2 4960 bytes
SHA-256: e3b64547d10832b0cefa5ecfadabd10a10781b5da890864b5f113ce58d982301
font_01_sfnt_off0000ffaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAA 10928 bytes
SHA-256: e6fb7d772570dcfa6162362f1b6335f3ccfb16c635f3bdaaa46152b31296dfe4

Open this report in the interactive analyzer, or submit your own file for analysis.