Malicious PDF — malware analysis report

Static analysis result for SHA-256 814aeee0580af47c…

MALICIOUS

PDF

71.6 KB Created: 2021-03-15 08:18:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81ec46863063d6c29bc020fe7f62a1e2 SHA-1: 7d53529c0d48c180ea6c237425ee78651aa1be21 SHA-256: 814aeee0580af47cc71e48db300142232652839af6b367526a57455b84bfb77e
96 Risk Score

Malware Insights

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

The file was detected as malicious by a ML classifier and ClamAV, with the ClamAV signature indicating it is a Pdf.Phishing.Trojan. The presence of an external URI pointing to 'vilenefex.ru' strongly suggests a phishing or malware distribution attempt, aligning with the Spearphishing Attachment technique. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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
  • 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://vilenefex.ru/award?keyword=blue+room+pretoria+menu+pdf
    • http://lumapon.iblogger.org/5446527539.pdf
    • http://bluebadgeapproval.com/biribonogoxepaxilepr5ivp.pdf
    • http://arm-watch3.club/finding_sales_tax_worksheetej6xa.pdf
    • http://noverst.xyz/what_does_box_around_dimension_meanaifav.pdf
    • https://cdn.sqhk.co/bepoweruga/jhicPgh/90357018806.pdf
    • http://pozopamux.iblogger.org/fifuvasivufawozis.pdf
    • http://crawlmqyu.space/45872488504sipbq.pdf
    • http://lutazukaroxi.22web.org/40446070262.pdf
    • https://cdn.sqhk.co/goganededem/hEgcjhJ/king_tools_for_koa_gogo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://52ed6390-a5c1-4502-9f93-599cf6d98ad1.filesusr.com/ugd/f7fbc8_a7143548e63148ffa345f78329dd0fa8.pdf?index=true
    • https://e97408dc-4b05-4e3b-9f19-f4127feb49ef.filesusr.com/ugd/a42eed_adff3e92d29b47ee8c8c786d9b4bce41.pdf?index=true
    • https://90e68d66-75cd-4f9f-aa76-03b1e6b67b4d.filesusr.com/ugd/324cd8_2c3e1c28a5394f7a93c1f05470fe4aa9.pdf?index=true
    • http://sabiwilurase.atwebpages.com/volando_sobre_el_pantano_audiolibro.pdf
    • http://mixonanax.epizy.com/campephilus_imperialis.pdf
    • https://52a1af19-6946-4c37-aba6-ab00a30e4874.filesusr.com/ugd/5dc3ca_60fa3ad992fa4f81920b89d179aa6c25.pdf?index=true
    • https://uploads.strikinglycdn.com/files/63287a97-6ab3-4dca-a1fb-90eb2761b7d3/how_to_start_a_trampoline_park_business.pdf
    • http://xexagum.epizy.com/vekefenivakam.pdf
    • https://uploads.strikinglycdn.com/files/78313661-afe9-4680-91cf-bbc94bf592ad/bewejanilavi.pdf
    • http://tefetuzuzip.myartsonline.com/how_to_sketch_for_beginners.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9df.bin
5e326f23bb2e995cdf4dddb91e1715e002121c8fe33e97ea5ed8c8bbad6dab09
pdf-font-stream PDF embedded font (sfnt) at offset 0xD9DF 5056 bytes
font_01_sfnt_off0000eafb.bin
08be547c17dc97e11730aeafdb0889e9604a3ef5d6d8b189c9e353f330dd7b4a
pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFB 11300 bytes