Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b5e83b5a68a1a50…

MALICIOUS

PDF

78.3 KB Created: 2021-03-14 19:40:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9ea85214f652908b858f90435fc01415 SHA-1: 849fb9a826aa361d3763ce66a8ba32dce0d29fe8 SHA-256: 3b5e83b5a68a1a505d76b36a4fcb87db6a0ceb8fee29daf15e6f82d2c6349c34
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 0.9993

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://nipisod.ru/wix?keyword=hannah+montana+the+movie+online+free PDF link annotation
    • https://wasutemup.weebly.com/uploads/1/3/4/6/134651280/291841d.pdfIn PDF document text
    • http://gefosezidubajoz.scienceontheweb.net/numafaweleputulog.pdfIn PDF document text
    • https://kavikazu.weebly.com/uploads/1/3/5/3/135392310/gumud-mabekexe-wiwefekadedexi-kojixekusu.pdfIn PDF document text
    • https://nunigagajil.weebly.com/uploads/1/3/4/7/134751499/zesawet_jipojuletok_vogapuzejakepom_kuwitulixumos.pdfIn PDF document text
    • http://rosativiwam.mypressonline.com/roloxasexu.pdfIn PDF document text
    • https://rurepatokuzi.weebly.com/uploads/1/3/1/6/131636758/7786699.pdfIn PDF document text
    • http://sufofure.mywebcommunity.org/94051481898.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489404/normal_5fed9c591a427.pdfIn PDF document text
    • https://jaxuvoxet.weebly.com/uploads/1/3/5/9/135979876/895391.pdfIn PDF document text
    • http://fotogodopuxet.iblogger.org/92489186866.pdfIn PDF document text
    • https://xororawezajeber.weebly.com/uploads/1/3/5/3/135338150/fozafulowafovef-tidisasajutixog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459177/normal_604999cca8827.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481164/normal_602ef96631075.pdfIn PDF document text
    • https://kemosufasegu.weebly.com/uploads/1/3/4/3/134348140/661412.pdfIn PDF document text
    • https://jigukijovumide.weebly.com/uploads/1/3/0/7/130740363/vuxuxafewubasumisaw.pdfIn PDF document text
    • https://fiwozipuwawew.weebly.com/uploads/1/3/0/8/130814157/selasowufulegi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kalilom.epizy.com/13570302202.pdfIn PDF document text
    • https://s3.amazonaws.com/gewuwasi/compress_mac_os.pdfIn PDF document text
    • http://jefebewo.epizy.com/electric_pressure_cooker_repair.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/ginafum.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/diwalulaxa.pdfIn PDF document text
    • http://mipuvofelope.epizy.com/muviposelakixelepodazi.pdfIn PDF document text
    • http://sujuxokilir.epizy.com/pafanagezuwepeleno.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_off0000f64b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF64B 4848 bytes
SHA-256: 2b35b2a5119435f5c40fde5ee9b23a76093d659b5f5e1aff0481bbc116b1aa5a
font_01_sfnt_off000106a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A5 10760 bytes
SHA-256: 4bc7b4a07f48ff5806caba0d42e45e7cecd7813dfa10e67cbdf123c8dd053ef7

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