Malicious PDF — malware analysis report

Static analysis result for SHA-256 2caf30aa46245471…

MALICIOUS

PDF

69.1 KB Created: 2020-11-29 02:31:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 608ee358957a255cf050d924ed9f66fe SHA-1: 536fed41328743f7e8de2fe92470a976911fec12 SHA-256: 2caf30aa462454715a65e198fc53e29343357aebe5ff34c7e1d63a8ef635b1e2
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF containing a large number of embedded links, many of which point to known malicious redirectors or link farms. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?utm_term=water+fleas+daphnia In PDF document text
    • https://gevofiku.weebly.com/uploads/1/3/4/7/134759045/loxikowig.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/rakuvudabasim-gubaxevuruwojix.pdfIn PDF document text
    • https://jiluzeros.weebly.com/uploads/1/3/4/3/134365673/newuvobigego_vetobelovax_rawumoj.pdfIn PDF document text
    • https://tukibasitotaz.weebly.com/uploads/1/3/4/4/134445351/7368cd7823ee5.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/e9ff54.pdfIn PDF document text
    • https://piziruzebizopu.weebly.com/uploads/1/3/4/3/134350425/kevosuleteru_nugujuvonibenor_resazoxol.pdfIn PDF document text
    • https://lolipakefupixo.weebly.com/uploads/1/3/4/6/134614949/4607968.pdfIn PDF document text
    • https://kuvikupomudu.weebly.com/uploads/1/3/4/4/134457818/jakimizefakofi-xikelegawa-bebudabizegevi-fobusenux.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/xifabilejilab/juzivozuvujonim.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/18918672831.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/29909960687.pdfIn PDF document text
    • https://s3.amazonaws.com/dorobukasawituw/befozizofedazovaseru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c373f676-7936-4edd-8f1d-2813601fcb65/mojolerofek.pdfIn PDF document text
    • https://s3.amazonaws.com/xuzed/business_writing_skills_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fasanag/download_bleach_episode_dub.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_off0000d19c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD19C 5144 bytes
SHA-256: 7900e0365d76d6c9fbe4405b7f0c933a1695a8b00b98cb652dd6079f1e7acbdc
font_01_sfnt_off0000e325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE325 10828 bytes
SHA-256: 4d00b7caa0945e3eb9a8a8d7291ce85420bf8824963610560f2e3d5219b586eb

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