Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c5cfdd6a49ca16e…

MALICIOUS

PDF

85.1 KB Created: 2021-02-28 06:17:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 02b7d089e93c8f70ea222c4fbfb52591 SHA-1: 522bb57cead10c1d8b9c34de9a2b494eb672598e SHA-256: 6c5cfdd6a49ca16eebc56e459a13c34df0f6b55b5081dd6ab0093ad099c8d450
66 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by an ML classifier. It contains multiple external URIs, including one pointing to 'pelibifir.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, appears to be a lure related to search terms, directing users to external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://pelibifir.ru/strik?utm_term=ancient+egyptian+spell+books PDF link annotation
    • https://wijodemarivupi.weebly.com/uploads/1/3/4/8/134861972/jomefu-rarudajata-tupigejuguve.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449185/normal_5ff0b1b85f5ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423429/normal_5fd933bb35d26.pdfIn PDF document text
    • https://mepagalupotope.weebly.com/uploads/1/3/4/2/134265457/subigitokumo.pdfIn PDF document text
    • https://sazefowefojewen.weebly.com/uploads/1/3/4/8/134893887/nigedese.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469103/normal_5fc9e7ae31974.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417313/normal_5fd80d946976a.pdfIn PDF document text
    • https://wawodedirikib.weebly.com/uploads/1/3/5/3/135348651/mitepute.pdfIn PDF document text
    • https://vidiwubiref.weebly.com/uploads/1/3/0/8/130874646/2f888.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405638/normal_5febb069af35e.pdfIn PDF document text
    • http://drilltech.info/gakenuvoniwus140o6.pdfIn PDF document text
    • https://tavovoxiwazufaj.weebly.com/uploads/1/3/5/3/135325502/07ec85555fe.pdfIn PDF document text
    • https://totijavefukaja.weebly.com/uploads/1/3/4/7/134705726/senobijebuniwos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488822/normal_6017ac432ece1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454995/normal_5feaf1d014757.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/sigobija/dikutoralezawepaxamovu.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/call_of_duty_ghosts_map_guides.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_off000107d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107D0 5300 bytes
SHA-256: f7aca249ce59c23fad5c1496009c50201641d9dffd48d7e270533349f8d3aef9
font_01_sfnt_off000119fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119FC 13624 bytes
SHA-256: 726a18a85955e128e8284947a2ae07d57150ec9bc1aed54a85d9b58d1a1a6264

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