Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8e2b31c6a28f57b…

MALICIOUS

PDF

87.6 KB Created: 2021-05-18 02:49:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: ddd1f76cd30097b745cf509241ff32f9 SHA-1: 9290261e29052f82e001358ef6552b369ee998a2 SHA-256: a8e2b31c6a28f57b7b90bca6afc7a6ae5cb3d1bc828c9b2d1828668a149ae110
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified by the 'PDF_SEO_LINK_FARM' heuristic, suggesting an attempt to manipulate search engine results or redirect users to malicious sites. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics confirm its malicious nature, with ClamAV identifying it as a phishing trojan. While no scripts were explicitly extracted, the presence of numerous external URIs indicates a likely intent to redirect users, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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
  • 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.
  • 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://maypoin.ru/strik?utm_term=clauses+and+phrases+1.2+worksheet+answers PDF link annotation
    • http://vezokikawelin.iblogger.org/pengembangan_kawasan_agropolitan.pdfIn PDF document text
    • https://mawubuzepegi.weebly.com/uploads/1/3/3/9/133989242/6450963.pdfIn PDF document text
    • https://guzepebizosi.weebly.com/uploads/1/3/4/8/134880367/magawibur.pdfIn PDF document text
    • https://wefizaxire.weebly.com/uploads/1/3/0/9/130969527/vunegozonanawol-soxenabojir.pdfIn PDF document text
    • https://zonujonuwug.weebly.com/uploads/1/3/4/3/134309714/jezotidomasuwe.pdfIn PDF document text
    • https://xariwavunulopex.weebly.com/uploads/1/3/1/4/131406448/45e2b03732463f.pdfIn PDF document text
    • https://negapisege.weebly.com/uploads/1/3/4/6/134635707/gojebo_revuga_gukamaxojobirix.pdfIn PDF document text
    • https://soridafufunet.weebly.com/uploads/1/3/5/3/135308698/ef3e61fe1ab.pdfIn PDF document text
    • https://fimupekegu.weebly.com/uploads/1/3/4/5/134502303/4444177.pdfIn PDF document text
    • https://bogexisamalalu.weebly.com/uploads/1/3/5/3/135320210/pigodubu-fudamubaju-zexapumavevi-mofozidozijes.pdfIn PDF document text
    • https://zimiposix.weebly.com/uploads/1/3/4/6/134690331/fikudeto_fodiji_velebojusedek_pomuzetew.pdfIn PDF document text
    • https://fifikasato.weebly.com/uploads/1/3/1/4/131437502/wugavuvidinaze.pdfIn PDF document text
    • http://bojosizupopope.22web.org/msi_760gm-e51_fx_alaplap.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/xewamejixolefaj/68885848853.pdfIn PDF document text
    • http://vexidolovosope.rf.gd/22108810838.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/identify_colors_worksheets.pdfIn PDF document text
    • http://zakuzoresibib.epizy.com/83822845899.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/95910821323.pdfIn PDF document text
    • https://s3.amazonaws.com/xujitezu/51752221485.pdfIn PDF document text
    • https://s3.amazonaws.com/suximawo/free_after_effects_templates_product_promo.pdfIn PDF document text
    • http://donarup.rf.gd/19591877674.pdfIn PDF document text
    • https://s3.amazonaws.com/lumixi/13291855919.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/93181578245.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_off00011a89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A89 5324 bytes
SHA-256: d4daa722486f96b05f5fc6ac6b8012d14d94e67dad37564092522e0786d77dd6
font_01_sfnt_off00012cb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CB3 10620 bytes
SHA-256: 9636db53fab93e317ac94f7ef5e9171b756a31ef78ee4468cfcf95fd6f604efa

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