Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb60ec73f2508dc9…

MALICIOUS

PDF

106.1 KB Created: 2021-03-11 22:39:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c28cb6e9b0ba16c37c6861d655105914 SHA-1: 982a270cb567cc6f5bcb99d3d2c65c30d99b391c SHA-256: fb60ec73f2508dc979ace11f6e322387586821d67c79e0c0d4fb418131f3a5f1
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. 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 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=taotronics+tt-ba01+manual PDF link annotation
    • https://lafowujokunoro.weebly.com/uploads/1/3/0/7/130738997/vobejowakiwut.pdfIn PDF document text
    • https://kufojinelimipi.weebly.com/uploads/1/3/0/7/130776518/mopusevureso.pdfIn PDF document text
    • https://sigesibum.weebly.com/uploads/1/3/1/4/131438142/lamavujevibupij-pagatewufuguk-gemujosituwu-jirotegojoxa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476281/normal_600dbef9c532e.pdfIn PDF document text
    • https://jatilupek.weebly.com/uploads/1/3/4/4/134491857/nadakifex.pdfIn PDF document text
    • https://zagemixawidi.weebly.com/uploads/1/3/1/3/131378918/wigatimut.pdfIn PDF document text
    • https://gawakugoful.weebly.com/uploads/1/3/4/7/134757428/benuxivobin_xolotu_fifawamukajegu_mowerenure.pdfIn PDF document text
    • https://dovasivenumi.weebly.com/uploads/1/3/5/9/135965427/texonerodupovej-tulikili-sovijuro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495034/normal_5fd85a424a9b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_602a4909a763b.pdfIn PDF document text
    • https://solazipakiku.weebly.com/uploads/1/3/4/5/134509697/gukenofafexa_gifijasubidumil_rabinefo.pdfIn PDF document text
    • https://dibotora.weebly.com/uploads/1/3/4/8/134870334/2912476.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376357/normal_602eac06546e9.pdfIn PDF document text
    • https://jazelisis.weebly.com/uploads/1/3/4/8/134870131/6018842.pdfIn PDF document text
    • https://mujabimebedegi.weebly.com/uploads/1/3/4/2/134234846/3279760.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494889/normal_5ff1f259c100e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dexodekelaseki/jupiter_monthly_income_fund_fact_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/hedda_gabler_play_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/bugixogakuka.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_off000161d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161D2 5260 bytes
SHA-256: 6bfe712299a7777118031c6362df46c51a66a585b338092593e9b8ac0ec90437
font_01_sfnt_off000173a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x173A5 11508 bytes
SHA-256: 50ee7c9d708bfdab83f7c21cff22361a5c4cea0933aa4049f0635fbe16082873

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