Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7558852b18c530c…

MALICIOUS

PDF

67.6 KB Created: 2021-04-01 04:53:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d61462dc5cfed1eb09ca408fb9dccffa SHA-1: d204799ae8d45789e1676e2a95e1f6c2fe55b5e6 SHA-256: e7558852b18c530c4b3df49c4bfcb6fa8e509f06d93b68dffb68032ff6bb77fa
154 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a PDF_SEO_LINK_FARM heuristic, suggesting a link-farming or redirection scheme. The embedded URLs point to various PDF documents, some of which are likely malicious based on ClamAV detection and ML classification. The document body is heavily obfuscated, but the presence of external links and the heuristic firings indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9945

Heuristics 4

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://crophysi.ru/aws?utm_term=what+book+in+the+bible+talks+about+lucifer%2527s+fall
    • http://wojisub.mypressonline.com/cambridge_igcse_mathematics_core_practice_book.pdf
    • https://cdn.sqhk.co/likafupat/UMrcvib/3d_block_letters_generator.pdf
    • https://cdn.sqhk.co/nuzifixe/cibShhf/94086359590.pdf
    • https://cdn.sqhk.co/gebitasixa/geHafgi/aguacate_beneficios.pdf
    • http://fizarumokugafu.mywebcommunity.org/autocad_underlay_to_lines.pdf
    • https://cdn.sqhk.co/duponetix/KgdLVhc/58929548835.pdf
    • https://cdn.sqhk.co/sigagegijej/i3U1jgG/rebirthm_best_pvp_class.pdf
    • https://cdn.sqhk.co/juvanejejuwo/jjgRAhj/bulujuzerapojibejitu.pdf
    • https://cdn.sqhk.co/metexemoraga/Stpibgi/sobelomipokogomus.pdf
    • https://cdn.sqhk.co/kikutajaz/3ibjdAo/nagidagajexazunulesodute.pdf
    • https://cdn.sqhk.co/wadusazilox/ejb4uFn/93410549867.pdf
    • https://cdn.sqhk.co/bitulore/P7nhjgh/prop_hunt_map_codes_in_fortnite.pdf
    • https://cdn.sqhk.co/kogeledewafo/djg1Uhg/bunikobewiluzoguvefo.pdf
    • https://cdn.sqhk.co/nomuzali/pjjgfSI/hourly_photo_studio_rental_chicago.pdf
    • http://valigulepi.scienceontheweb.net/practicality_in_assessment.pdf
    • https://woduluzotuni.weebly.com/uploads/1/3/4/3/134373450/vefozozojire.pdf
    • https://cdn.sqhk.co/vitimosugu/ly3hdih/25828990415.pdf
    • https://tafubevodila.weebly.com/uploads/1/3/4/0/134016741/gagidoturaxel.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3a6dee1b-d184-40b4-8910-e55a2f4e5ff2/92322750345.pdf
    • https://uploads.strikinglycdn.com/files/b589b360-2d4b-4d82-b47a-690bc8e50e5a/stihl_ms350_price.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f863.bin
8b71613f74297f38a9fe50493b2ca68daca5e4a364f23fe0147792444ec1393c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF863 5100 bytes

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