Malicious PDF — malware analysis report

Static analysis result for SHA-256 f29550aba431c408…

MALICIOUS

PDF

71.1 KB Created: 2021-05-20 22:24:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: cc9edc2eeb1612ee630cb57e5b0c2856 SHA-1: fd6403c75ac775dccb140b5a0f35590f54d59f5a SHA-256: f29550aba431c4089fcbd912bd20da3cf8dc454a044708d746456ef2ccc49503
242 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to disposable hosting services like Weebly. The heuristic firings indicate that this is a link farm designed to redirect users to malicious infrastructure, as evidenced by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM alerts. The ML classifier also flagged this PDF as malicious, supporting the phishing and redirection intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8422

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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.
  • 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://dafemum.ru/wb?keyword=intellicharger%20i2%20user%20manual In PDF document text
    • https://zudasejavezumuj.weebly.com/uploads/1/3/4/0/134017640/b1a12e.pdfIn PDF document text
    • https://rusekawavupor.weebly.com/uploads/1/3/4/0/134096427/kovotamewomejos.pdfIn PDF document text
    • https://xoxawipexari.weebly.com/uploads/1/3/0/7/130775732/simimedawugukimix.pdfIn PDF document text
    • https://pazolumaf.weebly.com/uploads/1/3/4/3/134356568/37a9b.pdfIn PDF document text
    • https://pijewiki.weebly.com/uploads/1/3/5/9/135966210/2b29bae.pdfIn PDF document text
    • https://junobinedutuki.weebly.com/uploads/1/3/2/7/132712306/mavixanuf-kigitube.pdfIn PDF document text
    • https://mowazaxof.weebly.com/uploads/1/3/4/7/134704653/xoweb_gozor_gafuvipurala.pdfIn PDF document text
    • https://dovasivenumi.weebly.com/uploads/1/3/5/9/135965427/texonerodupovej-tulikili-sovijuro.pdfIn PDF document text
    • https://reguxisafado.weebly.com/uploads/1/3/4/2/134265580/d25c28ac7c.pdfIn PDF document text
    • https://sudodufutela.weebly.com/uploads/1/3/5/9/135960501/2643816.pdfIn PDF document text
    • https://daniveledize.weebly.com/uploads/1/3/4/9/134900130/limaxetija.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379852/normal_6055c0019b941.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368489/normal_5fe72f6c83aad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464068/normal_6007e308dadf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403819/normal_60316565c2838.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369304/normal_5fd3a711b5757.pdfIn PDF document text
    • https://xokefazekuli.weebly.com/uploads/1/3/5/9/135992394/rirajukew-molunonaviri.pdfIn PDF document text
    • https://paseruvuweduzuw.weebly.com/uploads/1/3/1/4/131437476/7784132.pdfIn PDF document text
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/8660761.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477637/normal_5ff66568c35d4.pdfIn PDF document text
    • https://lewagezu.weebly.com/uploads/1/3/4/3/134369469/zuwagaf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459796/normal_6007e6133bf24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376098/normal_605a6e3b747cc.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/zetubakuz/love_chunibyo__other_delusions_ending_song.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/someboxupegiva.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/school_leadership_vision_statement_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/vekuxegoxejokawupajux.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC44 5052 bytes
SHA-256: 4d72a6094fbeec8e1ffd5f639779fbeed2f4d6f6e6b1126d615ff56cdb2baf68

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